diff --git a/src/meshlab/shaders/phong.gdp b/src/meshlab/shaders/phong.gdp
index 5236ab017..8e80d46b4 100644
--- a/src/meshlab/shaders/phong.gdp
+++ b/src/meshlab/shaders/phong.gdp
@@ -21,7 +21,11 @@
   </FPCount>
   <TexturesPlugins NumberOfPlugins="0" />
   <TexturedUsed NumberUsedTU="0" />
-  <UniformVariables NumberOfVariables="0" />
+  <UniformVariables NumberOfVariables="1">
+    <Uniform0 Type="5" Name="shininess" ArraySize="1" Widget="2" Min="0" Max="128" Step="0.001">
+      <Values Value0="32" />
+    </Uniform0>
+  </UniformVariables>
   <FogParameters FogColorR="0" FogColorG="0" FogColorB="0" FogColorA="1" Density="1" Start="0" End="1" />
   <VertexProcessor CullFace="False" PolygonMode="DummieField" PolygonModeBack="6914" PolygonModeFront="6914" LocalValue="1" TwoSidedValue="0" ColorControlValue="33273" />
   <FragmentProcessor Shade="7425" AlphaTest="False" AlphaFunc="516" AlphaClamp="0.5" Blending="False" BlendFuncSRC="770" BlendFuncDST="771" BlendEquation="32774" DepthTest="True" DepthFunc="515" ClampNear="0" ClampFar="1" ClearColorR="0.5019608" ClearColorG="0.5019608" ClearColorB="0.5019608" ClearColorA="1" />