diff --git a/src/regexp.c b/src/regexp.c
index 4b14745..45485f4 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -2746,8 +2746,7 @@
 }
 #endif
 
-#if (defined(FEAT_X11) && (defined(FEAT_TITLE) || defined(FEAT_XCLIPBOARD))) \
-	|| defined(PROTO)
+#if defined(FEAT_X11) || defined(PROTO)
 /*
  * Return whether "prog" is currently being executed.
  */