diff --git a/src/xenia/gpu/d3d11/d3d11_shader_translator.cc b/src/xenia/gpu/d3d11/d3d11_shader_translator.cc
index 32fd1aad5..213608de9 100644
--- a/src/xenia/gpu/d3d11/d3d11_shader_translator.cc
+++ b/src/xenia/gpu/d3d11/d3d11_shader_translator.cc
@@ -289,6 +289,7 @@ int D3D11ShaderTranslator::TranslatePixelShader(
       "  float4 r%d = c[%d];\n", n, n + 256);
   }
   append("  float4 t;\n");
+  append("  float s;\n");  // scalar result (used for RETAIN_PREV)
 
   // Bring registers local.
   if (alloc_counts.params) {
@@ -1027,6 +1028,11 @@ int D3D11ShaderTranslator::TranslateALU_SUB_CONST_1(const instr_alu_t& alu) {
   return TranslateALU_SUB_CONST_0(alu);
 }
 
+int D3D11ShaderTranslator::TranslateALU_RETAIN_PREV(const instr_alu_t& alu) {
+  // TODO(benvanik): pull out prev value in s.
+  return 1;
+}
+
 namespace {
 
 typedef int (D3D11ShaderTranslator::*TranslateFn)(const instr_alu_t& alu);
diff --git a/src/xenia/gpu/d3d11/d3d11_shader_translator.h b/src/xenia/gpu/d3d11/d3d11_shader_translator.h
index 1f8823cc1..72be1aee8 100644
--- a/src/xenia/gpu/d3d11/d3d11_shader_translator.h
+++ b/src/xenia/gpu/d3d11/d3d11_shader_translator.h
@@ -105,6 +105,7 @@ private:
   int TranslateALU_ADD_CONST_1(const xenos::instr_alu_t& alu);
   int TranslateALU_SUB_CONST_0(const xenos::instr_alu_t& alu);
   int TranslateALU_SUB_CONST_1(const xenos::instr_alu_t& alu);
+  int TranslateALU_RETAIN_PREV(const xenos::instr_alu_t& alu);
 
   void PrintDestFecth(uint32_t dst_reg, uint32_t dst_swiz);
   void AppendFetchDest(uint32_t dst_reg, uint32_t dst_swiz);