diff --git a/RecoVertex/KinematicFitPrimitives/interface/KinematicPerigeeConversions.h b/RecoVertex/KinematicFitPrimitives/interface/KinematicPerigeeConversions.h
index 87c14f221cbe6..c4493ec146e71 100644
--- a/RecoVertex/KinematicFitPrimitives/interface/KinematicPerigeeConversions.h
+++ b/RecoVertex/KinematicFitPrimitives/interface/KinematicPerigeeConversions.h
@@ -1,5 +1,5 @@
 #ifndef KinematicPerigeeConversions_H
-#define KinematicPerigeeConversions_h
+#define KinematicPerigeeConversions_H
 
 #include "RecoVertex/KinematicFitPrimitives/interface/KinematicParameters.h"
 #include "RecoVertex/KinematicFitPrimitives/interface/KinematicState.h"