diff --git a/src/Primitives/Implementation/Spheroid.h b/src/Primitives/Implementation/Spheroid.h
index b493ee42e..241b77f92 100644
--- a/src/Primitives/Implementation/Spheroid.h
+++ b/src/Primitives/Implementation/Spheroid.h
@@ -1,5 +1,5 @@
-#ifndef Magnum_Primitives_Spheroid_h
-#define Magnum_Primitives_Spheroid_h
+#ifndef Magnum_Primitives_Implementation_Spheroid_h
+#define Magnum_Primitives_Implementation_Spheroid_h
 /*
     This file is part of Magnum.