diff --git a/rlib/c/werr b/rlib/c/werr
index a2213bf582d68bd250133d9c6fc8b9861c3dc7f5..9d28e2067e3313c6283f0762f5907c89ff4007f0 100644
--- a/rlib/c/werr
+++ b/rlib/c/werr
@@ -41,7 +41,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <swis.h>
+#include "swis.h"
 
 #include "os.h"
 #include "wimp.h"