diff --git a/GPU/Software/Lighting.cpp b/GPU/Software/Lighting.cpp
index 82315b1b20ab..88a950d9304b 100644
--- a/GPU/Software/Lighting.cpp
+++ b/GPU/Software/Lighting.cpp
@@ -35,6 +35,9 @@ static inline Vec3f GetLightVec(const u32 lparams[12], int light) {
 }
 
 static inline float pspLightPow(float v, float e) {
+	if (e <= 0.0f) {
+		return 1.0f;
+	}
 	if (v > 0.0f) {
 		return pow(v, e);
 	}