diff --git a/src/operator/contrib/mrcnn_mask_target.cu b/src/operator/contrib/mrcnn_mask_target.cu
index e85b6a5e2c95..d913f2486d44 100644
--- a/src/operator/contrib/mrcnn_mask_target.cu
+++ b/src/operator/contrib/mrcnn_mask_target.cu
@@ -146,7 +146,7 @@ __device__ void RoIAlignForward(
     T roi_height = roi_end_h - roi_start_h;
 
     // Force malformed ROIs to be 1x1
-    if (!continuous_coordinate) { // backward compatiblity
+    if (!continuous_coordinate) {  // backward compatiblity
       // Force malformed ROIs to be 1x1
       roi_width = max(roi_width, (T)1.);
       roi_height = max(roi_height, (T)1.);
@@ -260,7 +260,7 @@ void MRCNNMaskTargetRun<gpu>(const MRCNNMaskTargetParam& param, const std::vecto
 
     MRCNNMaskTargetKernel<<<dimGrid, dimBlock, 0, stream>>>
     (rois.dptr_, gt_masks.dptr_, matches.dptr_, cls_targets.dptr_,
-    out_masks.dptr_, out_mask_cls.dptr_, num_el, param.aligned, 
+    out_masks.dptr_, out_mask_cls.dptr_, num_el, param.aligned,
     batch_size, param.num_classes, param.num_rois,
     num_gtmasks, gt_height, gt_width,
     param.mask_size[0], param.mask_size[1], param.sample_ratio);
diff --git a/src/operator/contrib/roi_align.cc b/src/operator/contrib/roi_align.cc
index 4741be189efc..eeb9f622c2be 100644
--- a/src/operator/contrib/roi_align.cc
+++ b/src/operator/contrib/roi_align.cc
@@ -187,7 +187,7 @@ num_threads(engine::OpenMP::Get()->GetRecommendedOMPThreadCount())
     if (continuous_coordinate) {
       CHECK_GT(roi_width, 0.);
       CHECK_GT(roi_height, 0.);
-    } else { // backward compatiblity
+    } else {  // backward compatiblity
       // Force malformed ROIs to be 1x1
       roi_width = std::max(roi_width, (T)1.);
       roi_height = std::max(roi_height, (T)1.);
@@ -367,7 +367,7 @@ void ROIAlignBackward(
 
     T roi_width = roi_end_w - roi_start_w;
     T roi_height = roi_end_h - roi_start_h;
-    if (!continuous_coordinate) { // backward compatiblity
+    if (!continuous_coordinate) {  // backward compatiblity
       // Force malformed ROIs to be 1x1
       roi_width = std::max(roi_width, (T)1.);
       roi_height = std::max(roi_height, (T)1.);
diff --git a/src/operator/contrib/roi_align.cu b/src/operator/contrib/roi_align.cu
index 8cf5f1f5efe9..3d085d3031b5 100644
--- a/src/operator/contrib/roi_align.cu
+++ b/src/operator/contrib/roi_align.cu
@@ -142,7 +142,7 @@ __global__ void RoIAlignForwardKernel(
 
     T roi_width = roi_end_w - roi_start_w;
     T roi_height = roi_end_h - roi_start_h;
-    if (!continuous_coordinate) { // backward compatiblity
+    if (!continuous_coordinate) {  // backward compatiblity
       // Force malformed ROIs to be 1x1
       roi_width = max(roi_width, (T)1.);
       roi_height = max(roi_height, (T)1.);
@@ -284,7 +284,7 @@ __global__ void RoIAlignBackwardKernel(
 
     T roi_width = roi_end_w - roi_start_w;
     T roi_height = roi_end_h - roi_start_h;
-    if (!continuous_coordinate) { // backward compatiblity
+    if (!continuous_coordinate) {  // backward compatiblity
       // Force malformed ROIs to be 1x1
       roi_width = max(roi_width, (T)1.);
       roi_height = max(roi_height, (T)1.);