diff --git a/plugins/GSdx/res/glsl_source.h b/plugins/GSdx/res/glsl_source.h
index 83b07a29b..383829b55 100644
--- a/plugins/GSdx/res/glsl_source.h
+++ b/plugins/GSdx/res/glsl_source.h
@@ -857,8 +857,12 @@ static const char* tfx_glsl =
 	"#endif\n"
 	"\n"
 	"// Same buffer but 2 colors for dual source blending\n"
+	"#if GL_ES\n"
+	"layout(location = 0) out vec4 SV_Target0;\n"
+	"#else\n"
 	"layout(location = 0, index = 0) out vec4 SV_Target0;\n"
 	"layout(location = 0, index = 1) out vec4 SV_Target1;\n"
+	"#endif\n"
 	"\n"
 	"#ifdef DISABLE_GL42\n"
 	"uniform sampler2D TextureSampler;\n"
@@ -1232,6 +1236,13 @@ static const char* tfx_glsl =
 	"{\n"
 	"    vec4 c = ps_color();\n"
 	"\n"
+	"#if GL_ES\n"
+	"\n"
+	"    c.a *= 2.0;\n"
+	"    SV_Target0 = c;\n"
+	"\n"
+	"#else\n"
+	"\n"
 	"    float alpha = c.a * 2.0;\n"
 	"\n"
 	"    if(PS_AOUT != 0) // 16 bit output\n"
@@ -1247,6 +1258,9 @@ static const char* tfx_glsl =
 	"\n"
 	"    SV_Target0 = c;\n"
 	"    SV_Target1 = vec4(alpha, alpha, alpha, alpha);\n"
+	"\n"
+	"#endif\n"
+	"\n"
 	"}\n"
 	"#endif\n"
 	;