diff --git a/Source/Core/VideoCommon/UberShaderPixel.cpp b/Source/Core/VideoCommon/UberShaderPixel.cpp
index a96b15c83d..67f7ce5524 100644
--- a/Source/Core/VideoCommon/UberShaderPixel.cpp
+++ b/Source/Core/VideoCommon/UberShaderPixel.cpp
@@ -889,8 +889,8 @@ ShaderCode GenPixelShader(APIType api_type, const ShaderHostConfig& host_config,
   out.Write(
       "      uint alpha_compare_op = alpha_scale << 1 | uint(alpha_op);\n"
       "\n"
-      "      int alpha_A;\n"
-      "      int alpha_B;\n"
+      "      int alpha_A = 0;\n"
+      "      int alpha_B = 0;\n"
       "      if (alpha_bias != 3u || alpha_compare_op > 5u) {{\n"
       "        // Small optimisation here: alpha_A and alpha_B are unused by compare ops 0-5\n"
       "        alpha_A = selectAlphaInput(s, ss, {0}colors_0, {0}colors_1, alpha_a) & 255;\n"