diff --git a/data/shaders/utils/getLightFactor.frag b/data/shaders/utils/getLightFactor.frag
index 9bf4cdf58..c17a3ca8b 100644
--- a/data/shaders/utils/getLightFactor.frag
+++ b/data/shaders/utils/getLightFactor.frag
@@ -14,6 +14,6 @@ vec3 getLightFactor(float specMapValue)
     vec3 DiffuseComponent = texture(DiffuseMap, tc).xyz;
     vec3 SpecularComponent = texture(SpecularMap, tc).xyz;
     float ao = texture(SSAO, tc).x;
-    vec3 tmp = DiffuseComponent + SpecularComponent * specMapValue;
+    vec3 tmp = DiffuseComponent + SpecularComponent * max(specMapValue, 0.);
     return tmp * ao;
 }
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