diff --git a/vcg/complex/trimesh/update/color.h b/vcg/complex/trimesh/update/color.h
index 349ed03c..9708d06d 100644
--- a/vcg/complex/trimesh/update/color.h
+++ b/vcg/complex/trimesh/update/color.h
@@ -489,7 +489,7 @@ static int Gamma(UpdateMeshType &m, float gamma, const bool ProcessSelected=fals
     {
       if(!ProcessSelected || (*vi).IsS()) //if this vertex has been selected, do transormation
       {
-        (*vi).C() = ColorPow((*vi).C(),gamma);
+        (*vi).C() = ColorPow((*vi).C(), 1/gamma);
         ++counter;
       }
     }