diff --git a/GPU/GLES/FragmentShaderGenerator.cpp b/GPU/GLES/FragmentShaderGenerator.cpp
index 5d6114cfd4..33b63bce58 100644
--- a/GPU/GLES/FragmentShaderGenerator.cpp
+++ b/GPU/GLES/FragmentShaderGenerator.cpp
@@ -149,15 +149,9 @@ StencilValueType ReplaceAlphaWithStencilType() {
 		case GE_STENCILOP_REPLACE:
 			return (gstate.getStencilTestRef() & 0x80) != 0 ? STENCIL_VALUE_ONE : STENCIL_VALUE_ZERO;
 
-		case GE_STENCILOP_ZERO:
-			if (gstate.getStencilOpZFail() == GE_STENCILOP_ZERO) {
-				return STENCIL_VALUE_ZERO;
-			} else {
-				return STENCIL_VALUE_KEEP;
-			}
-
 		// Decrementing always zeros, since there's only one bit.
 		case GE_STENCILOP_DECR:
+		case GE_STENCILOP_ZERO:
 			return STENCIL_VALUE_ZERO;
 
 		// Incrementing always fills, since there's only one bit.
@@ -186,11 +180,11 @@ StencilValueType ReplaceAlphaWithStencilType() {
 				return STENCIL_VALUE_KEEP;
 			}
 
+		// Decrementing always zeros, since there's only one bit.
 		case GE_STENCILOP_DECR:
 		case GE_STENCILOP_INCR:
 		case GE_STENCILOP_INVERT:
 			return STENCIL_VALUE_UNKNOWN;
-
 		case GE_STENCILOP_KEEP:
 			return STENCIL_VALUE_KEEP;
 		}