diff --git a/Libraries/LibCore/CIODevice.cpp b/Libraries/LibCore/CIODevice.cpp
index 8c8fd57a33..0f69fb6cd6 100644
--- a/Libraries/LibCore/CIODevice.cpp
+++ b/Libraries/LibCore/CIODevice.cpp
@@ -126,7 +126,7 @@ ByteBuffer CIODevice::read_all()
         char read_buffer[4096];
         int nread = ::read(m_fd, read_buffer, sizeof(read_buffer));
         if (nread < 0) {
-            set_error(nread);
+            set_error(errno);
             return ByteBuffer::copy(data.data(), data.size());
         }
         if (nread == 0) {
@@ -196,7 +196,7 @@ bool CIODevice::close()
         return false;
     int rc = ::close(fd());
     if (rc < 0) {
-        set_error(rc);
+        set_error(errno);
         return false;
     }
     set_fd(-1);
diff --git a/Libraries/LibCore/CLocalSocket.cpp b/Libraries/LibCore/CLocalSocket.cpp
index 53e13e3889..0f7ce785ed 100644
--- a/Libraries/LibCore/CLocalSocket.cpp
+++ b/Libraries/LibCore/CLocalSocket.cpp
@@ -15,7 +15,7 @@ CLocalSocket::CLocalSocket(CObject* parent)
 {
     int fd = socket(AF_LOCAL, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
     if (fd < 0) {
-        set_error(fd);
+        set_error(errno);
     } else {
         set_fd(fd);
         set_mode(CIODevice::ReadWrite);
diff --git a/Libraries/LibCore/CSocket.cpp b/Libraries/LibCore/CSocket.cpp
index f9bfd1b3bf..a6339bedb1 100644
--- a/Libraries/LibCore/CSocket.cpp
+++ b/Libraries/LibCore/CSocket.cpp
@@ -125,7 +125,7 @@ bool CSocket::send(const ByteBuffer& data)
 {
     int nsent = ::send(fd(), data.pointer(), data.size(), 0);
     if (nsent < 0) {
-        set_error(nsent);
+        set_error(errno);
         return false;
     }
     ASSERT(nsent == data.size());
diff --git a/Libraries/LibCore/CTCPSocket.cpp b/Libraries/LibCore/CTCPSocket.cpp
index 4bfe37d4fe..5f5ebb79da 100644
--- a/Libraries/LibCore/CTCPSocket.cpp
+++ b/Libraries/LibCore/CTCPSocket.cpp
@@ -15,7 +15,7 @@ CTCPSocket::CTCPSocket(CObject* parent)
 {
     int fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
     if (fd < 0) {
-        set_error(fd);
+        set_error(errno);
     } else {
         set_fd(fd);
         set_mode(CIODevice::ReadWrite);