diff --git a/src/misc1.c b/src/misc1.c
index 94c2b41..c1cc89c 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -3405,7 +3405,9 @@
 	    n = TO_SPECIAL(buf[1], buf[2]);
 	    if (buf[1] == KS_MODIFIER
 		    || n == K_IGNORE
+#ifdef FEAT_MOUSE
 		    || (is_mouse_key(n) && n != K_LEFTMOUSE)
+#endif
 #ifdef FEAT_GUI
 		    || n == K_VER_SCROLLBAR
 		    || n == K_HOR_SCROLLBAR