diff --git a/engine/src/core-data/Common/MatDefs/Light/Lighting.vert b/engine/src/core-data/Common/MatDefs/Light/Lighting.vert
index 238ffd21c..2c3285e12 100644
--- a/engine/src/core-data/Common/MatDefs/Light/Lighting.vert
+++ b/engine/src/core-data/Common/MatDefs/Light/Lighting.vert
@@ -188,7 +188,7 @@ void main(){
     #else
       AmbientSum  = vec3(0.2, 0.2, 0.2) * g_AmbientLightColor.rgb; // Default: ambient color is dark gray
       DiffuseSum  = lightColor;
-      SpecularSum = lightColor.rgb;
+      SpecularSum = vec3(0.0);
     #endif
 
     #ifdef VERTEX_COLOR