diff --git a/src/ffx-fsr2-api/ffx_fsr2.cpp b/src/ffx-fsr2-api/ffx_fsr2.cpp
index b0cd593..c9beff8 100644
--- a/src/ffx-fsr2-api/ffx_fsr2.cpp
+++ b/src/ffx-fsr2-api/ffx_fsr2.cpp
@@ -516,7 +516,7 @@ static FfxErrorCode fsr2Create(FfxFsr2Context_Private* context, const FfxFsr2Con
             FFX_SURFACE_FORMAT_R16G16_FLOAT, contextDescription->displaySize.width, contextDescription->displaySize.height, 1, FFX_RESOURCE_FLAGS_NONE },
 
         {   FFX_FSR2_RESOURCE_IDENTIFIER_LOCK_INPUT_LUMA, L"FSR2_LockInputLuma", (FfxResourceUsage)(FFX_RESOURCE_USAGE_UAV),
-            FFX_SURFACE_FORMAT_R16_FLOAT, contextDescription->displaySize.width, contextDescription->displaySize.height, 1, FFX_RESOURCE_FLAGS_ALIASABLE },
+            FFX_SURFACE_FORMAT_R16_FLOAT, contextDescription->maxRenderSize.width, contextDescription->maxRenderSize.height, 1, FFX_RESOURCE_FLAGS_ALIASABLE },
 
         {   FFX_FSR2_RESOURCE_IDENTIFIER_NEW_LOCKS, L"FSR2_NewLocks", (FfxResourceUsage)(FFX_RESOURCE_USAGE_UAV),
             FFX_SURFACE_FORMAT_R8_UNORM, contextDescription->displaySize.width, contextDescription->displaySize.height, 1, FFX_RESOURCE_FLAGS_ALIASABLE },