diff --git a/ctype/ispunct.c b/ctype/ispunct.c
index 3417907..cf184c8 100644
--- a/ctype/ispunct.c
+++ b/ctype/ispunct.c
@@ -1,4 +1,4 @@
-#include <stdio.h>
+#include <ctype.h>
 
 int ispunct(int c) {
   return (c < 128 && !(isalnum(c) || iscntrl(c)));