diff --git a/LibC/errno_numbers.h b/LibC/errno_numbers.h
index 476079e927..a787dd75aa 100644
--- a/LibC/errno_numbers.h
+++ b/LibC/errno_numbers.h
@@ -45,11 +45,7 @@
     __ERROR(ENOTSOCK,       "Not a socket") \
     __ERROR(EADDRINUSE,     "Address in use") \
     __ERROR(EWHYTHO,        "Failed without setting an error code (Bug!)") \
-    __ERROR(EBADWINDOW,     "Bad window ID") \
-    __ERROR(EBADBACKING,    "Bad backing store ID") \
     __ERROR(ENOTEMPTY,      "Directory not empty") \
-    __ERROR(EBADMENUBAR,    "Bad menubar ID") \
-    __ERROR(EBADMENU,       "Bad menu ID") \
 
 
 enum __errno_values {