diff --git a/ext/c/liboga.h b/ext/c/liboga.h
index e758d3a..3e66b0e 100644
--- a/ext/c/liboga.h
+++ b/ext/c/liboga.h
@@ -3,7 +3,6 @@
 
 #include <ruby.h>
 #include <ruby/encoding.h>
-#include <stdio.h>
 
 #include "lexer.h"