diff --git a/Source/Core/VideoCommon/Src/LightingShaderGen.h b/Source/Core/VideoCommon/Src/LightingShaderGen.h
index 031dce44bd..b7f596bdd3 100644
--- a/Source/Core/VideoCommon/Src/LightingShaderGen.h
+++ b/Source/Core/VideoCommon/Src/LightingShaderGen.h
@@ -150,7 +150,10 @@ static void GenerateLightingShader(T& object, LightingUidData& uid_data, int com
 				else if (components & VB_HAS_COL0 )
 					object.Write("lacc = %s0;\n", inColorName);
 				else
-					object.Write("lacc = float4(0.0f, 0.0f, 0.0f, 0.0f);\n");
+					// TODO: this isn't verified. Here we want to read the ambient from the vertex,
+					// but the vertex itself has no color. So we don't know which value to read.
+					// Returing 1.0 is the same as disabled lightning, so this could be fine
+					object.Write("lacc = float4(1.0f, 1.0f, 1.0f, 1.0f);\n");
 			}
 			else // from color
 			{
@@ -191,7 +194,8 @@ static void GenerateLightingShader(T& object, LightingUidData& uid_data, int com
 				else if (components & VB_HAS_COL0 )
 					object.Write("lacc.w = %s0.w;\n", inColorName);
 				else
-					object.Write("lacc.w = 0.0f;\n");
+					// TODO: The same for alpha: We want to read from vertex, but the vertex has no color
+					object.Write("lacc.w = 1.0f;\n");
 			}
 			else // from color
 			{