diff --git a/src/OpenFOAM/primitives/septernion/septernion.C b/src/OpenFOAM/primitives/septernion/septernion.C
index 34562bba0..33cdf44c7 100644
--- a/src/OpenFOAM/primitives/septernion/septernion.C
+++ b/src/OpenFOAM/primitives/septernion/septernion.C
@@ -93,7 +93,7 @@ Foam::septernion Foam::average
         }
     }
 
-    normalize(sa.r());
+    sa.r().normalize();
 
     return sa;
 }