diff --git a/driver/cfparse.y b/driver/cfparse.y
index ce86ef2f5..c768b9e37 100644
--- a/driver/cfparse.y
+++ b/driver/cfparse.y
@@ -22,6 +22,7 @@
 # include  "cfparse_misc.h"
 # include  <ctype.h>
 # include  <stdlib.h>
+# include  <stdio.h>
 # include  <string.h>