diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8070da18..87201823a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -184,9 +184,6 @@ endif( HAVE_SYS_TIME_H AND HAVE_TIME_H )
 check_include_file( "valgrind/memcheck.h" HAVE_VALGRIND_MEMCHECK_H )
 check_include_file( "values.h" HAVE_VALUES_H )
 check_include_file( "X11/extensions/shape.h" HAVE_X11_EXTENSIONS_SHAPE_H )
-check_include_file( "X11/extensions/Xrandr.h" HAVE_X11_EXTENSIONS_XRANDR_H )
-check_include_file( "X11/extensions/XShm.h" HAVE_X11_EXTENSIONS_XSHM_H )
-check_include_file( "X11/ICE/ICElib.h" HAVE_X11_ICE_ICELIB_H )
 check_include_file( "/usr/src/sys/gnu/i386/isa/sound/awe_voice.h" HAVE__USR_SRC_SYS_GNU_I386_ISA_SOUND_AWE_VOICE_H )
 check_include_file( "/usr/src/sys/i386/isa/sound/awe_voice.h" HAVE__USR_SRC_SYS_I386_ISA_SOUND_AWE_VOICE_H )
 
diff --git a/config.h.cmake b/config.h.cmake
index 871c9f4bf..719e324df 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -650,15 +650,6 @@
 /* Define to 1 if you have the <X11/extensions/shape.h> header file. */
 #cmakedefine HAVE_X11_EXTENSIONS_SHAPE_H 1
 
-/* Define to 1 if you have the <X11/extensions/Xrandr.h> header file. */
-#cmakedefine HAVE_X11_EXTENSIONS_XRANDR_H 1
-
-/* Define to 1 if you have the <X11/extensions/XShm.h> header file. */
-#cmakedefine HAVE_X11_EXTENSIONS_XSHM_H 1
-
-/* Define to 1 if you have the <X11/ICE/ICElib.h> header file. */
-#cmakedefine HAVE_X11_ICE_ICELIB_H 1
-
 /* Define to 1 if the assembler supports 3DNOW instructions. */
 #undef HAVE_X86_3DNOW
 
@@ -677,9 +668,6 @@
 /* Define to 1 if you have the `_getpty' function. */
 #cmakedefine HAVE__GETPTY 1
 
-/* Define to 1 if you have the `_IceTransNoListen' function. */
-#undef HAVE__ICETRANSNOLISTEN
-
 /* Define to 1 if you have the </usr/src/sys/gnu/i386/isa/sound/awe_voice.h> header file. */
 #cmakedefine HAVE__USR_SRC_SYS_GNU_I386_ISA_SOUND_AWE_VOICE_H 1