diff --git a/rpcs3/Emu/RSX/Program/GLSLCommon.cpp b/rpcs3/Emu/RSX/Program/GLSLCommon.cpp
index 4701d5dcec..2072fda2bf 100644
--- a/rpcs3/Emu/RSX/Program/GLSLCommon.cpp
+++ b/rpcs3/Emu/RSX/Program/GLSLCommon.cpp
@@ -946,10 +946,14 @@ namespace glsl
 					"\n"
 					"	if (actual_step.x > uv_step.x)\n"
 					"	{\n"
-					"		// Downscale in X\n"
+					"		// Downscale in X, centered\n"
+					"		const vec4 sample4 = texelFetch2DMS(tex, sample_count, icoords, index, ivec2(-1, 0));\n"
+					"		const vec4 sample5 = texelFetch2DMS(tex, sample_count, icoords, index, ivec2(-1, 1));\n"
+					"\n"
 					"		factor = min(actual_step.x / uv_step.x, 2.0);\n"
-					"		a = fma(sample1, (factor - 1.).xxxx, sample0) / factor;\n"
-					"		b = fma(sample3, (factor - 1.).xxxx, sample2) / factor;\n"
+					"		const float half_factor = (factor - 1.) * 0.5;\n"
+					"		a = fma((sample1 + sample4), half_factor.xxxx, sample0) / factor;\n"
+					"		b = fma((sample3 + sample5), half_factor.xxxx, sample2) / factor;\n"
 					"	}\n"
 					"	else if (actual_step.x < uv_step.x)\n"
 					"	{\n"