diff --git a/config.h.in b/config.h.in
index cf11750d..0b27ec17 100644
--- a/config.h.in
+++ b/config.h.in
@@ -20,19 +20,19 @@ print [@/*************************************************************/
 /* Source: config.h.in; to regenerate run ./configure        */
 /*************************************************************/@]
 
-print {\n\n/* Define to 1 if cairo is available and is to be used */\n}
+print {\n\n/* Define this var if cairo is available and is to be used */\n}
 print_ternary ?libs/gui/cairo/presents {#define HAS_CAIRO 1} {/*#undef HAS_CAIRO */}
 
-print {\n\n/* Define to 1 if Xlib's xcb is available */\n}
+print {\n\n/* Define this var if Xlib's xcb is available */\n}
 print_ternary ?libs/gui/xcb/presents {#define HAS_XCB 1} {/*#undef HAS_XCB */}
 
-print {\n\n/* Define to 1 if Xlib's xrender is available */\n}
+print {\n\n/* Define this var if Xlib's xrender is available */\n}
 print_ternary ?libs/gui/xrender/presents {#define HAS_XRENDER 1} {/*#undef HAS_RENDER */}
 
-print {\n\n/* Define to 1 if popen(3) is available */\n}
+print {\n\n/* Define this var if popen(3) is available */\n}
 print_ternary ?libs/io/popen/presents {#define HAS_POPEN 1} {/*#undef HAS_POPEN */}
 
-print {\n\n/* Define to 1 if popen(3) is not available but fork(2) and pipe(2) are available */\n}
+print {\n\n/* Define this var if popen(3) is not available but fork(2) and pipe(2) are available */\n}
 print_ternary ?libs/io/pipe/presents {#define HAS_PIPE 1} {/*#undef HAS_PIPE */}
 
 print [@