diff --git a/paddle/fluid/operators/detection/generate_proposals_op.cc b/paddle/fluid/operators/detection/generate_proposals_op.cc
index 663fabd3c456185d73510a0d7570d534316b38da..981a368e8564fbcd3d688bc67d2def8664bcfe8d 100644
--- a/paddle/fluid/operators/detection/generate_proposals_op.cc
+++ b/paddle/fluid/operators/detection/generate_proposals_op.cc
@@ -378,7 +378,7 @@ class GenerateProposalsKernel : public framework::OpKernel<T> {
       for (int i = 0; i < num; i++) {
         lod_data[i] = tmp_lod[i];
       }
-      rpn_rois_lod->Resize({num, 1});
+      rpn_rois_lod->Resize({num});
     }
     rpn_rois->set_lod(lod);
     rpn_roi_probs->set_lod(lod);