Index: libcio/putc.c
===================================================================
--- libcio/putc.c	(revision 7af8be4146b7665a3c5d25c39c1ecc2f3b0ff34f)
+++ libcio/putc.c	(revision 92479b9486786632d76e33d176ba6b1ae68db900)
@@ -8,5 +8,5 @@
 #include "ram.h"
 
-static int16_t (*cls_rtn)();
+static void (*cls_rtn)(void);
 
 int16_t	_ClFlag;