diff --git a/Eigen/src/Geometry/Transform.h b/Eigen/src/Geometry/Transform.h
index c4ebe00d27..cd8d74bae5 100644
--- a/Eigen/src/Geometry/Transform.h
+++ b/Eigen/src/Geometry/Transform.h
@@ -604,7 +604,7 @@ public:
     if(int(Mode)!=int(AffineCompact))
     {
       matrix().template block<1,Dim>(Dim,0).setZero();
-      matrix().coeffRef(Dim,Dim) = 1;
+      matrix().coeffRef(Dim,Dim) = Scalar(1);
     }
   }