diff --git a/maskrcnn_benchmark/structures/bounding_box.py b/maskrcnn_benchmark/structures/bounding_box.py
index 4084024fa..25791d578 100644
--- a/maskrcnn_benchmark/structures/bounding_box.py
+++ b/maskrcnn_benchmark/structures/bounding_box.py
@@ -166,7 +166,7 @@ def transpose(self, method):
 
     def crop(self, box):
         """
-        Cropss a rectangular region from this bounding box. The box is a
+        Crops a rectangular region from this bounding box. The box is a
         4-tuple defining the left, upper, right, and lower pixel
         coordinate.
         """