diff --git a/src/caffe/layers/deconv_layer.cu b/src/caffe/layers/deconv_layer.cu
index ea83f56f1b2..5dbdcc3149f 100644
--- a/src/caffe/layers/deconv_layer.cu
+++ b/src/caffe/layers/deconv_layer.cu
@@ -51,7 +51,7 @@ void DeconvolutionLayer<Dtype>::Backward_gpu(const vector<Blob<Dtype>*>& top,
         }
         // gradient w.r.t. bottom data, if necessary.
         if (propagate_down[i]) {
-          this->forward_gpu_gemm(top_diff + this->top_dim_, weight,
+          this->forward_gpu_gemm(top_diff + n * this->top_dim_, weight,
               bottom_diff + n * this->bottom_dim_,
               this->param_propagate_down_[0]);
         }