diff --git a/SevenSegment.h b/SevenSegment.h
index 5e8530d..b330404 100644
--- a/SevenSegment.h
+++ b/SevenSegment.h
@@ -1,5 +1,5 @@
-#ifndef Blink_h
-#define Blink_h
+#ifndef SevenSegment_h
+#define SevenSegment_h
 
 #include <Arduino.h>