diff --git a/include/polarssl/havege.h b/include/polarssl/havege.h
index 3ad84b4..1ae3342 100644
--- a/include/polarssl/havege.h
+++ b/include/polarssl/havege.h
@@ -1,8 +1,8 @@
 /**
  * \file havege.h
  */
-#ifndef XYSSL_HAVEGE_H
-#define XYSSL_HAVEGE_H
+#ifndef POLARSSL_HAVEGE_H
+#define POLARSSL_HAVEGE_H
 
 #define COLLECT_SIZE 1024