diff --git a/src/xenia/gpu/spirv_shader_translator_rb.cc b/src/xenia/gpu/spirv_shader_translator_rb.cc
index f2be2b72b..fb058ad88 100644
--- a/src/xenia/gpu/spirv_shader_translator_rb.cc
+++ b/src/xenia/gpu/spirv_shader_translator_rb.cc
@@ -4401,8 +4401,11 @@ void SpirvShaderTranslator::FSI_AlphaToMask() {
     FSI_AlphaToMaskSample(false, 1, 1.0f, threshold_offset, 1.0f / 8.0f, alpha,
                           coverage_2x);
   } else {
-    // FBO: Account for native 2x vs 2x-as-4x sample mapping.
-    if (native_2x_msaa_no_attachments_) {
+    // FBO: Account for native 2x vs 2x-as-4x sample mapping. This epilogue only
+    // runs when there is a color attachment (sample mask output), so whether 2x
+    // is native must be taken from the capability with attachments, matching
+    // the choice made for the host pipeline.
+    if (native_2x_msaa_with_attachments_) {
       // Native 2x: D3D10.1+ standard - top is 1, bottom is 0.
       FSI_AlphaToMaskSample(true, 1, 0.5f, threshold_offset, 1.0f / 8.0f, alpha,
                             coverage_2x);