diff --git a/GPU/GLES/FragmentShaderGenerator.cpp b/GPU/GLES/FragmentShaderGenerator.cpp
index 3ace94d4db..8760a0a7e5 100644
--- a/GPU/GLES/FragmentShaderGenerator.cpp
+++ b/GPU/GLES/FragmentShaderGenerator.cpp
@@ -93,6 +93,8 @@ static bool IsAlphaTestTriviallyTrue() {
 	case GE_COMP_LESS:
 	case GE_COMP_NOTEQUAL:
 		return false;
+	default:
+		return false;
 	}
 }
 
@@ -108,6 +110,8 @@ static bool IsColorTestTriviallyTrue() {
 	case GE_COMP_EQUAL:
 	case GE_COMP_NOTEQUAL:
 		return false;
+	default:
+		return false;
 	}
 }