Index: config.h.in
===================================================================
--- config.h.in	(revision 5851)
+++ config.h.in	(revision 5852)
@@ -87,10 +87,10 @@
 end;
 
 print {\n\n/* Define to 1 if Xinerama is available */\n}
-print_ternary libs/gui/xinerama/presents {#define HAVE_XINERAMA 1} {/*#undef HAVE_XINERAMA */}
+print_ternary ?libs/gui/xinerama/presents {#define HAVE_XINERAMA 1} {/*#undef HAVE_XINERAMA */}
 
 print {\n\n/* Define to 1 if Xrender is available */\n}
-print_ternary libs/gui/xrender/presents {#define HAVE_XRENDER 1} {/*#undef HAVE_XRENDER */}
+print_ternary ?libs/gui/xrender/presents {#define HAVE_XRENDER 1} {/*#undef HAVE_XRENDER */}
 
 print {\n\n/* Define to 1 if translation of program messages to the user's native language is requested. */\n}
 print_ternary /local/pcb/want_nls {#define ENABLE_NLS 1} {/*#undef ENABLE_NLS */}