diff --git a/lemon/concepts/maps.h b/lemon/concepts/maps.h
--- a/lemon/concepts/maps.h
+++ b/lemon/concepts/maps.h
@@ -16,8 +16,8 @@
  *
  */
 
-#ifndef LEMON_CONCEPT_MAPS_H
-#define LEMON_CONCEPT_MAPS_H
+#ifndef LEMON_CONCEPTS_MAPS_H
+#define LEMON_CONCEPTS_MAPS_H
 
 #include <lemon/core.h>
 #include <lemon/concept_check.h>
@@ -213,4 +213,4 @@
 
 } //namespace lemon
 
-#endif // LEMON_CONCEPT_MAPS_H
+#endif