diff --git a/CMakeLists.txt b/CMakeLists.txt
index b01ef6275..0dbb39225 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -88,11 +88,6 @@ else()
   set(FISH_IN_TREE_BUILD FALSE)
 endif()
 
-# Set up config.h
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config_cmake.h.in
-               ${CMAKE_CURRENT_BINARY_DIR}/config.h)
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-
 # Set up the machinery around FISH-BUILD-VERSION-FILE
 # This defines the FBVF variable.
 include(Version)
diff --git a/config_cmake.h.in b/config_cmake.h.in
deleted file mode 100644
index d0028e08e..000000000
--- a/config_cmake.h.in
+++ /dev/null
@@ -1,22 +0,0 @@
-/* Define to 1 if you have the `gettext' function. */
-#cmakedefine HAVE_GETTEXT 1
-
-/* Define to 1 if the status that wait returns and WEXITSTATUS expects is signal and then ret instead of the other way around. */
-#cmakedefine HAVE_WAITSTATUS_SIGNAL_RET 1
-
-/* Define to 1 if the _nl_msg_cat_cntr symbol is exported. */
-#cmakedefine HAVE__NL_MSG_CAT_CNTR 1
-
-/* Define to the address where bug reports for this package should be sent. */
-#define PACKAGE_BUGREPORT "https://github.com/fish-shell/fish-shell/issues"
-
-/* Define to the full name of this package. */
-#define PACKAGE_NAME "fish"
-
-/* Enable GNU extensions on systems that have them.  */
-#ifndef _GNU_SOURCE
-# define _GNU_SOURCE 1
-#endif
-
-/* The size of wchar_t in bits. */
-#define WCHAR_T_BITS ${WCHAR_T_BITS}
diff --git a/src/libc.c b/src/libc.c
index 6440878ac..d4a983ae1 100644
--- a/src/libc.c
+++ b/src/libc.c
@@ -1,5 +1,3 @@
-#include "config.h"
-
 #include <paths.h>
 #include <stdbool.h>
 #include <stdint.h>