diff --git a/components/esm/weatherstate.hpp b/components/esm/weatherstate.hpp
index 545751225..d0cd59c16 100644
--- a/components/esm/weatherstate.hpp
+++ b/components/esm/weatherstate.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_ESM_WEATHER_H
-#define OPENMW_ESM_WEATHER_H
+#ifndef OPENMW_ESM_WEATHERSTATE_H
+#define OPENMW_ESM_WEATHERSTATE_H
 
 #include <string>