Index: libcio/fprintf.c
===================================================================
--- libcio/fprintf.c	(revision bfc0072417012e9cf8877387e0040d6245a99117)
+++ libcio/fprintf.c	(revision ab831410f4986c6eb0768538abede9e201092183)
@@ -12,5 +12,5 @@
 static FILE *Stream;
 
-extern	int	_dofmt();
+extern	int	dofmt_();
 extern	int	aputc();
 
@@ -24,5 +24,5 @@
 	Stream = stream;
 	va_start(aptr, fmt);
-	count = _dofmt(fpsub, fmt, aptr);
+	count = dofmt_(fpsub, fmt, aptr);
 	va_end(aptr);
 	return(count);