diff --git a/src/gpu/d3d12/SDL_gpu_d3d12.c b/src/gpu/d3d12/SDL_gpu_d3d12.c
index 0c76e79225..ce0edc0b7f 100644
--- a/src/gpu/d3d12/SDL_gpu_d3d12.c
+++ b/src/gpu/d3d12/SDL_gpu_d3d12.c
@@ -5941,7 +5941,7 @@ static void D3D12_UploadToTexture(
                 SDL_memcpy(
                     temporaryBuffer->mapPointer + (sliceIndex * rowsPerSlice) + (rowIndex * alignedRowPitch),
                     transferBufferContainer->activeBuffer->mapPointer + source->offset + (sliceIndex * bytesPerSlice) + (rowIndex * rowPitch),
-                    alignedRowPitch);
+                    rowPitch);
             }
             Uint32 offset = source->offset + (sliceIndex * bytesPerSlice) + ((rowsPerSlice - 1) * rowPitch);
             SDL_memcpy(