diff --git a/src/finiteVolume/cfdTools/general/SRF/SRFModel/SRFModel/SRFModel.H b/src/finiteVolume/cfdTools/general/SRF/SRFModel/SRFModel/SRFModel.H
index d10c5adda378061be060a1901d2abd83902a09ea..52a72d8b6cc6a23f85b0df961f4717b8eb6612e2 100644
--- a/src/finiteVolume/cfdTools/general/SRF/SRFModel/SRFModel/SRFModel.H
+++ b/src/finiteVolume/cfdTools/general/SRF/SRFModel/SRFModel/SRFModel.H
@@ -75,7 +75,7 @@ protected:
         //- Reference to the mesh
         const fvMesh& mesh_;
 
-        //- Axis of rotation
+        //- Axis of rotation, a direction vector which passes through the origin
         vector axis_;
 
         //- SRF model coeficients dictionary