diff --git a/src/GLES2/GLSLCombiner_gles2.cpp b/src/GLES2/GLSLCombiner_gles2.cpp
index dcc35fb7..150c027d 100644
--- a/src/GLES2/GLSLCombiner_gles2.cpp
+++ b/src/GLES2/GLSLCombiner_gles2.cpp
@@ -179,13 +179,6 @@ ShaderCombiner::ShaderCombiner(Combiner & _color, Combiner & _alpha, const gDPCo
 	strFragmentShader.append("  vec_color = vec4(input_color, vShadeColor.a); \n");
 	strFragmentShader.append(strCombiner);
 
-	strFragmentShader.append(
-		"  if (uEnableAlphaTest != 0) {				\n"
-		"    lowp float alphaTestValue = (uAlphaCompareMode == 3 && alpha2 > 0.0) ? snoise() : uAlphaTestValue;	\n"
-		"    if  (alpha2 < alphaTestValue) discard;	\n"
-		"  }										\n"
-		);
-
 	if (!g_weakGLSL) {
 		strFragmentShader.append(
 			"  lowp int fogUsage = uFogUsage;			\n"
diff --git a/src/OGL3X/GLSLCombiner_ogl3x.cpp b/src/OGL3X/GLSLCombiner_ogl3x.cpp
index 749f72c8..ef7b40c1 100644
--- a/src/OGL3X/GLSLCombiner_ogl3x.cpp
+++ b/src/OGL3X/GLSLCombiner_ogl3x.cpp
@@ -330,13 +330,6 @@ ShaderCombiner::ShaderCombiner(Combiner & _color, Combiner & _alpha, const gDPCo
 	strFragmentShader.append("  vec_color = vec4(input_color, vShadeColor.a); \n");
 	strFragmentShader.append(strCombiner);
 
-	strFragmentShader.append(
-		"  if (uEnableAlphaTest != 0) {				\n"
-		"    lowp float alphaTestValue = (uAlphaCompareMode == 3 && alpha2 > 0.0) ? snoise() : uAlphaTestValue;	\n"
-		"    if  (alpha2 < alphaTestValue) discard;	\n"
-		"  }										\n"
-		);
-
 	if (config.generalEmulation.enableNoise != 0) {
 		strFragmentShader.append(
 			"  if (uColorDitherMode == 2) colorNoiseDither(snoise(), color2);	\n"
diff --git a/src/ShaderUtils.cpp b/src/ShaderUtils.cpp
index 5dd73f70..291030c1 100644
--- a/src/ShaderUtils.cpp
+++ b/src/ShaderUtils.cpp
@@ -235,6 +235,12 @@ int compileCombiner(Combiner & _color, Combiner & _alpha, char * _strShader)
 	}
 	strcpy(_strShader, "  alpha1 = ");
 	int nInputs = _compileCombiner(_alpha.stage[0], AlphaInput, _strShader);
+	strcat(_strShader,
+		"  if (uEnableAlphaTest != 0) {				\n"
+		"    lowp float alphaTestValue = (uAlphaCompareMode == 3 && alpha1 > 0.0) ? snoise() : uAlphaTestValue;	\n"
+		"    if  (alpha1 < alphaTestValue) discard;	\n"
+		"  }										\n"
+		);
 	strcat(_strShader, "  color1 = ");
 	nInputs |= _compileCombiner(_color.stage[0], ColorInput, _strShader);
 	strcat(_strShader, fragment_shader_blender);