diff --git a/rasterize_gaussians.cpp b/rasterize_gaussians.cpp
index d6a9d40..8a32330 100644
--- a/rasterize_gaussians.cpp
+++ b/rasterize_gaussians.cpp
@@ -212,7 +212,7 @@ tensor_list RasterizeGaussiansCPU::backward(AutogradContext *ctx, tensor_list gr
                             v_outImg,
                             v_outAlpha);
 
-    // delete[] px2gid;
+    delete[] px2gid;
 
 
     torch::Tensor v_xy = std::get<0>(t).to(device);