diff --git a/ruby/caca-event.h b/ruby/caca-event.h
index 7947007..9d3fbb2 100644
--- a/ruby/caca-event.h
+++ b/ruby/caca-event.h
@@ -1,5 +1,5 @@
-#ifndef __CACA_DISPLAY_H__
-#define __CACA_DISPLAY_H__
+#ifndef __CACA_EVENT_H__
+#define __CACA_EVENT_H__
 
 #include <ruby.h>