diff --git a/Applications/IRCClient/IRCClient.cpp b/Applications/IRCClient/IRCClient.cpp
index a48f5ca5ac..a6310789b6 100644
--- a/Applications/IRCClient/IRCClient.cpp
+++ b/Applications/IRCClient/IRCClient.cpp
@@ -4,7 +4,7 @@
 #include "IRCLogBuffer.h"
 #include "IRCWindow.h"
 #include "IRCWindowListModel.h"
-#include <LibGUI/GNotifier.h>
+#include <LibCore/CNotifier.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -47,8 +47,8 @@ void IRCClient::set_server(const String &hostname, int port)
 
 void IRCClient::on_socket_connected()
 {
-    m_notifier = make<GNotifier>(m_socket->fd(), GNotifier::Read);
-    m_notifier->on_ready_to_read = [this] (GNotifier&) { receive_from_server(); };
+    m_notifier = make<CNotifier>(m_socket->fd(), CNotifier::Read);
+    m_notifier->on_ready_to_read = [this] { receive_from_server(); };
 
     send_user();
     send_nick();
diff --git a/Applications/IRCClient/IRCClient.h b/Applications/IRCClient/IRCClient.h
index 91522b729b..a493fd2975 100644
--- a/Applications/IRCClient/IRCClient.h
+++ b/Applications/IRCClient/IRCClient.h
@@ -11,7 +11,7 @@
 class IRCChannel;
 class IRCQuery;
 class IRCWindowListModel;
-class GNotifier;
+class CNotifier;
 
 class IRCClient final : public CObject {
     friend class IRCChannel;
@@ -118,7 +118,7 @@ private:
 
     String m_nickname;
     Vector<char> m_line_buffer;
-    OwnPtr<GNotifier> m_notifier;
+    OwnPtr<CNotifier> m_notifier;
     HashMap<String, RetainPtr<IRCChannel>> m_channels;
     HashMap<String, RetainPtr<IRCQuery>> m_queries;
 
diff --git a/Applications/Terminal/Terminal.cpp b/Applications/Terminal/Terminal.cpp
index 4fe66c6039..a8e6267858 100644
--- a/Applications/Terminal/Terminal.cpp
+++ b/Applications/Terminal/Terminal.cpp
@@ -19,7 +19,7 @@
 
 Terminal::Terminal(int ptm_fd)
     : m_ptm_fd(ptm_fd)
-    , m_notifier(ptm_fd, GNotifier::Read)
+    , m_notifier(ptm_fd, CNotifier::Read)
 {
     m_cursor_blink_timer.set_interval(500);
     m_cursor_blink_timer.on_timeout = [this] {
@@ -28,9 +28,9 @@ Terminal::Terminal(int ptm_fd)
     };
 
     set_font(Font::default_fixed_width_font());
-    m_notifier.on_ready_to_read = [this] (GNotifier& notifier) {
+    m_notifier.on_ready_to_read = [this]{
         byte buffer[BUFSIZ];
-        ssize_t nread = read(notifier.fd(), buffer, sizeof(buffer));
+        ssize_t nread = read(m_ptm_fd, buffer, sizeof(buffer));
         if (nread < 0) {
             dbgprintf("Terminal read error: %s\n", strerror(errno));
             perror("read(ptm)");
diff --git a/Applications/Terminal/Terminal.h b/Applications/Terminal/Terminal.h
index f13eab22e6..3fedf44bdf 100644
--- a/Applications/Terminal/Terminal.h
+++ b/Applications/Terminal/Terminal.h
@@ -6,7 +6,7 @@
 #include <SharedGraphics/GraphicsBitmap.h>
 #include <SharedGraphics/Rect.h>
 #include <LibGUI/GWidget.h>
-#include <LibGUI/GNotifier.h>
+#include <LibCore/CNotifier.h>
 #include <LibGUI/GTimer.h>
 
 class Font;
@@ -152,7 +152,7 @@ private:
     bool m_in_active_window { false };
     bool m_need_full_flush { false };
 
-    GNotifier m_notifier;
+    CNotifier m_notifier;
 
     float m_opacity { 1 };
     bool m_needs_background_fill { true };
diff --git a/LibCore/CEventLoop.cpp b/LibCore/CEventLoop.cpp
index d7b474d276..d18da8fc65 100644
--- a/LibCore/CEventLoop.cpp
+++ b/LibCore/CEventLoop.cpp
@@ -1,7 +1,7 @@
 #include <LibCore/CObject.h>
 #include <LibCore/CEventLoop.h>
 #include <LibCore/CEvent.h>
-#include <LibGUI/GNotifier.h>
+#include <LibCore/CNotifier.h>
 #include <LibC/unistd.h>
 #include <LibC/stdio.h>
 #include <LibC/fcntl.h>
@@ -19,7 +19,7 @@
 static CEventLoop* s_main_event_loop;
 static Vector<CEventLoop*>* s_event_loop_stack;
 HashMap<int, OwnPtr<CEventLoop::EventLoopTimer>>* CEventLoop::s_timers;
-HashTable<GNotifier*>* CEventLoop::s_notifiers;
+HashTable<CNotifier*>* CEventLoop::s_notifiers;
 int CEventLoop::s_next_timer_id = 1;
 
 CEventLoop::CEventLoop()
@@ -27,7 +27,7 @@ CEventLoop::CEventLoop()
     if (!s_event_loop_stack) {
         s_event_loop_stack = new Vector<CEventLoop*>;
         s_timers = new HashMap<int, OwnPtr<CEventLoop::EventLoopTimer>>;
-        s_notifiers = new HashTable<GNotifier*>;
+        s_notifiers = new HashTable<CNotifier*>;
     }
 
     if (!s_main_event_loop) {
@@ -153,11 +153,11 @@ void CEventLoop::wait_for_event()
     add_file_descriptors_for_select(rfds, max_fd_added);
     max_fd = max(max_fd, max_fd_added);
     for (auto& notifier : *s_notifiers) {
-        if (notifier->event_mask() & GNotifier::Read)
+        if (notifier->event_mask() & CNotifier::Read)
             add_fd_to_set(notifier->fd(), rfds);
-        if (notifier->event_mask() & GNotifier::Write)
+        if (notifier->event_mask() & CNotifier::Write)
             add_fd_to_set(notifier->fd(), wfds);
-        if (notifier->event_mask() & GNotifier::Exceptional)
+        if (notifier->event_mask() & CNotifier::Exceptional)
             ASSERT_NOT_REACHED();
     }
 
@@ -189,11 +189,11 @@ void CEventLoop::wait_for_event()
     for (auto& notifier : *s_notifiers) {
         if (FD_ISSET(notifier->fd(), &rfds)) {
             if (notifier->on_ready_to_read)
-                notifier->on_ready_to_read(*notifier);
+                notifier->on_ready_to_read();
         }
         if (FD_ISSET(notifier->fd(), &wfds)) {
             if (notifier->on_ready_to_write)
-                notifier->on_ready_to_write(*notifier);
+                notifier->on_ready_to_write();
         }
     }
 
@@ -250,12 +250,12 @@ bool CEventLoop::unregister_timer(int timer_id)
     return true;
 }
 
-void CEventLoop::register_notifier(Badge<GNotifier>, GNotifier& notifier)
+void CEventLoop::register_notifier(Badge<CNotifier>, CNotifier& notifier)
 {
     s_notifiers->set(&notifier);
 }
 
-void CEventLoop::unregister_notifier(Badge<GNotifier>, GNotifier& notifier)
+void CEventLoop::unregister_notifier(Badge<CNotifier>, CNotifier& notifier)
 {
     s_notifiers->remove(&notifier);
 }
diff --git a/LibCore/CEventLoop.h b/LibCore/CEventLoop.h
index 2de219c5cd..9f97461711 100644
--- a/LibCore/CEventLoop.h
+++ b/LibCore/CEventLoop.h
@@ -10,7 +10,7 @@
 
 class CEvent;
 class CObject;
-class GNotifier;
+class CNotifier;
 
 class CEventLoop {
 public:
@@ -29,8 +29,8 @@ public:
     static int register_timer(CObject&, int milliseconds, bool should_reload);
     static bool unregister_timer(int timer_id);
 
-    static void register_notifier(Badge<GNotifier>, GNotifier&);
-    static void unregister_notifier(Badge<GNotifier>, GNotifier&);
+    static void register_notifier(Badge<CNotifier>, CNotifier&);
+    static void unregister_notifier(Badge<CNotifier>, CNotifier&);
 
     void quit(int);
 
@@ -72,5 +72,5 @@ private:
     static HashMap<int, OwnPtr<EventLoopTimer>>* s_timers;
     static int s_next_timer_id;
 
-    static HashTable<GNotifier*>* s_notifiers;
+    static HashTable<CNotifier*>* s_notifiers;
 };
diff --git a/LibCore/CNotifier.cpp b/LibCore/CNotifier.cpp
new file mode 100644
index 0000000000..59c2a460fe
--- /dev/null
+++ b/LibCore/CNotifier.cpp
@@ -0,0 +1,15 @@
+#include <LibCore/CNotifier.h>
+#include <LibGUI/GEventLoop.h>
+
+CNotifier::CNotifier(int fd, unsigned event_mask)
+    : m_fd(fd)
+    , m_event_mask(event_mask)
+{
+    GEventLoop::register_notifier(Badge<CNotifier>(), *this);
+}
+
+CNotifier::~CNotifier()
+{
+    GEventLoop::unregister_notifier(Badge<CNotifier>(), *this);
+}
+
diff --git a/LibGUI/GNotifier.h b/LibCore/CNotifier.h
similarity index 69%
rename from LibGUI/GNotifier.h
rename to LibCore/CNotifier.h
index 6876c481f4..baa3532b92 100644
--- a/LibGUI/GNotifier.h
+++ b/LibCore/CNotifier.h
@@ -2,7 +2,7 @@
 
 #include <AK/Function.h>
 
-class GNotifier {
+class CNotifier {
 public:
     enum Event {
         None        = 0,
@@ -10,11 +10,11 @@ public:
         Write       = 2,
         Exceptional = 4,
     };
-    GNotifier(int fd, unsigned event_mask);
-    ~GNotifier();
+    CNotifier(int fd, unsigned event_mask);
+    ~CNotifier();
 
-    Function<void(GNotifier&)> on_ready_to_read;
-    Function<void(GNotifier&)> on_ready_to_write;
+    Function<void()> on_ready_to_read;
+    Function<void()> on_ready_to_write;
 
     int fd() const { return m_fd; }
     unsigned event_mask() const { return m_event_mask; }
diff --git a/LibCore/Makefile b/LibCore/Makefile
index 2d90c6b16b..35a08edc3b 100644
--- a/LibCore/Makefile
+++ b/LibCore/Makefile
@@ -1,5 +1,6 @@
 OBJS = \
     CElapsedTimer.o \
+    CNotifier.o \
     CObject.o \
     CEventLoop.o \
     CEvent.o
diff --git a/LibGUI/GEventLoop.cpp b/LibGUI/GEventLoop.cpp
index 8e1bc69bc0..a7502c0b7e 100644
--- a/LibGUI/GEventLoop.cpp
+++ b/LibGUI/GEventLoop.cpp
@@ -4,7 +4,7 @@
 #include "GWindow.h"
 #include <LibGUI/GApplication.h>
 #include <LibGUI/GAction.h>
-#include <LibGUI/GNotifier.h>
+#include <LibCore/CNotifier.h>
 #include <LibGUI/GMenu.h>
 #include <LibGUI/GDesktop.h>
 #include <LibC/unistd.h>
diff --git a/LibGUI/GEventLoop.h b/LibGUI/GEventLoop.h
index bf09c4d401..3ee1dfc1fc 100644
--- a/LibGUI/GEventLoop.h
+++ b/LibGUI/GEventLoop.h
@@ -6,7 +6,7 @@
 
 class GAction;
 class CObject;
-class GNotifier;
+class CNotifier;
 class GWindow;
 
 class GEventLoop final : public CEventLoop {
diff --git a/LibGUI/GNotifier.cpp b/LibGUI/GNotifier.cpp
deleted file mode 100644
index 649cc84bcc..0000000000
--- a/LibGUI/GNotifier.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <LibGUI/GNotifier.h>
-#include <LibGUI/GEventLoop.h>
-
-GNotifier::GNotifier(int fd, unsigned event_mask)
-    : m_fd(fd)
-    , m_event_mask(event_mask)
-{
-    GEventLoop::register_notifier(Badge<GNotifier>(), *this);
-}
-
-GNotifier::~GNotifier()
-{
-    GEventLoop::unregister_notifier(Badge<GNotifier>(), *this);
-}
-
diff --git a/LibGUI/GSocket.cpp b/LibGUI/GSocket.cpp
index b1a1f4797d..6b088e2dbe 100644
--- a/LibGUI/GSocket.cpp
+++ b/LibGUI/GSocket.cpp
@@ -1,5 +1,5 @@
 #include <LibGUI/GSocket.h>
-#include <LibGUI/GNotifier.h>
+#include <LibCore/CNotifier.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -53,11 +53,11 @@ bool GSocket::connect(const GSocketAddress& address, int port)
     if (rc < 0) {
         if (errno == EINPROGRESS) {
             printf("in progress.\n");
-            m_notifier = make<GNotifier>(fd(), GNotifier::Event::Write);
-            m_notifier->on_ready_to_write = [this] (GNotifier&) {
+            m_notifier = make<CNotifier>(fd(), CNotifier::Event::Write);
+            m_notifier->on_ready_to_write = [this] {
                 printf("%s{%p} connected!\n", class_name(), this);
                 m_connected = true;
-                m_notifier->set_event_mask(GNotifier::Event::None);
+                m_notifier->set_event_mask(CNotifier::Event::None);
                 if (on_connected)
                     on_connected();
             };
diff --git a/LibGUI/GSocket.h b/LibGUI/GSocket.h
index f9501eab3f..697845d2d1 100644
--- a/LibGUI/GSocket.h
+++ b/LibGUI/GSocket.h
@@ -3,7 +3,7 @@
 #include <LibGUI/GIODevice.h>
 #include <LibGUI/GSocketAddress.h>
 
-class GNotifier;
+class CNotifier;
 
 class GSocket : public GIODevice {
 public:
@@ -40,5 +40,5 @@ protected:
 private:
     virtual bool open(GIODevice::OpenMode) override { ASSERT_NOT_REACHED(); }
     Type m_type { Type::Invalid };
-    OwnPtr<GNotifier> m_notifier;
+    OwnPtr<CNotifier> m_notifier;
 };
diff --git a/LibGUI/Makefile b/LibGUI/Makefile
index 37b21c6e62..b687153aa8 100644
--- a/LibGUI/Makefile
+++ b/LibGUI/Makefile
@@ -17,7 +17,6 @@ LIBGUI_OBJS = \
     GEventLoop.o \
     GLabel.o \
     GListBox.o \
-    GNotifier.o \
     GTextBox.o \
     GScrollBar.o \
     GStatusBar.o \