diff --git a/GPU/GLES/SoftwareTransform.cpp b/GPU/GLES/SoftwareTransform.cpp
index 47eee5e2b0..2c1470ccc5 100644
--- a/GPU/GLES/SoftwareTransform.cpp
+++ b/GPU/GLES/SoftwareTransform.cpp
@@ -489,7 +489,7 @@ void TransformDrawEngine::SoftwareTransformAndDraw(
 					Vec3f lightpos1 = Vec3f(gstate_c.lightpos[gstate.getUVLS1()]).Normalized();
 
 					uv[0] = (1.0f + Dot(lightpos0, normal))/2.0f;
-					uv[1] = (1.0f - Dot(lightpos1, normal))/2.0f;
+					uv[1] = (1.0f + Dot(lightpos1, normal))/2.0f;
 					uv[2] = 1.0f;
 				}
 				break;
diff --git a/GPU/GLES/VertexShaderGenerator.cpp b/GPU/GLES/VertexShaderGenerator.cpp
index 35085e8c40..db444ebeba 100644
--- a/GPU/GLES/VertexShaderGenerator.cpp
+++ b/GPU/GLES/VertexShaderGenerator.cpp
@@ -646,7 +646,7 @@ void GenerateVertexShader(int prim, u32 vertType, char *buffer, bool useHWTransf
 				break;
 
 			case GE_TEXMAP_ENVIRONMENT_MAP:  // Shade mapping - use dots from light sources.
-				WRITE(p, "  v_texcoord = u_uvscaleoffset.xy * vec2(1.0 + dot(normalize(u_lightpos%i), worldnormal), 1.0 - dot(normalize(u_lightpos%i), worldnormal)) * 0.5;\n", gstate.getUVLS0(), gstate.getUVLS1());
+				WRITE(p, "  v_texcoord = u_uvscaleoffset.xy * vec2(1.0 + dot(normalize(u_lightpos%i), worldnormal), 1.0 + dot(normalize(u_lightpos%i), worldnormal)) * 0.5;\n", gstate.getUVLS0(), gstate.getUVLS1());
 				break;
 
 			default: