diff --git a/Kernel/API/POSIX/netinet/in.h b/Kernel/API/POSIX/netinet/in.h
index ae8eed6523..be3d1aba6a 100644
--- a/Kernel/API/POSIX/netinet/in.h
+++ b/Kernel/API/POSIX/netinet/in.h
@@ -95,7 +95,13 @@ struct in6_addr {
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 \
     }
 
-extern struct in6_addr in6addr_any;
+#define IN6ADDR_LOOPBACK_INIT                          \
+    {                                                  \
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 \
+    }
+
+extern const struct in6_addr in6addr_any;
+extern const struct in6_addr in6addr_loopback;
 
 struct sockaddr_in6 {
     sa_family_t sin6_family;   // AF_INET6.
diff --git a/Userland/Libraries/LibC/net.cpp b/Userland/Libraries/LibC/net.cpp
index 145ef4b153..aa76ec0a6c 100644
--- a/Userland/Libraries/LibC/net.cpp
+++ b/Userland/Libraries/LibC/net.cpp
@@ -8,7 +8,8 @@
 #include <LibC/net/if.h>
 #include <LibC/netinet/in.h>
 
-in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+const in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+const in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
 
 unsigned int if_nametoindex([[maybe_unused]] const char* ifname)
 {