diff --git a/src/OpenFOAM/primitives/Vector2D/Vector2DI.H b/src/OpenFOAM/primitives/Vector2D/Vector2DI.H
index 3c5fcdb7d3..95c0514943 100644
--- a/src/OpenFOAM/primitives/Vector2D/Vector2DI.H
+++ b/src/OpenFOAM/primitives/Vector2D/Vector2DI.H
@@ -105,6 +105,8 @@ inline Foam::Vector2D<Cmpt>& Foam::Vector2D<Cmpt>::normalise()
     {
         *this /= s;
     }
+
+    return *this;
 }