diff --git a/src/cc65/stdfunc.c b/src/cc65/stdfunc.c
index 0a39fbead..7877f6c9d 100644
--- a/src/cc65/stdfunc.c
+++ b/src/cc65/stdfunc.c
@@ -48,6 +48,7 @@
 #include "litpool.h"
 #include "scanner.h"
 #include "stdfunc.h"
+#include "stdnames.h"
 #include "typeconv.h"