diff --git a/src/gui_x11.c b/src/gui_x11.c
index 2842fa0..b56c943 100644
--- a/src/gui_x11.c
+++ b/src/gui_x11.c
@@ -2450,7 +2450,7 @@
 	*colorPtr = colortable[closest];
     }
 
-    free(colortable);
+    vim_free(colortable);
     return OK;
 }