diff --git a/GPU/Common/VertexShaderGenerator.cpp b/GPU/Common/VertexShaderGenerator.cpp
index 15725f652f86..b1b9fa5e16ed 100644
--- a/GPU/Common/VertexShaderGenerator.cpp
+++ b/GPU/Common/VertexShaderGenerator.cpp
@@ -1072,7 +1072,7 @@ bool GenerateVertexShader(const VShaderID &id, char *buffer, const ShaderLanguag
 				p.C("    if (comp == 0x1u && ldot > 0.0) {\n");  // do specular
 				p.C("      if (u_matspecular.a > 0.0) {\n");
 				p.C("        ldot = dot(normalize(toLight + vec3(0.0, 0.0, 1.0)), worldnormal);\n");
-				p.C("        ldot = pow(ldot, u_matspecular.a);\n");
+				p.C("        ldot = pow(max(ldot, 0.0), u_matspecular.a);\n");
 				p.C("      } else {\n");
 				p.C("        ldot = 1.0;\n");
 				p.C("      }\n");
@@ -1147,7 +1147,7 @@ bool GenerateVertexShader(const VShaderID &id, char *buffer, const ShaderLanguag
 					p.C("  if (ldot >= 0.0) {\n");
 					p.C("    if (u_matspecular.a > 0.0) {\n");
 					p.C("      ldot = dot(normalize(toLight + vec3(0.0, 0.0, 1.0)), worldnormal);\n");
-					p.C("      ldot = pow(ldot, u_matspecular.a);\n");
+					p.C("      ldot = pow(max(ldot, 0.0), u_matspecular.a);\n");
 					p.C("    } else {\n");
 					p.C("      ldot = 1.0;\n");
 					p.C("    }\n");