diff --git a/lib/model/rpn/rpn.py b/lib/model/rpn/rpn.py
index 29bdaadb3..15012e143 100644
--- a/lib/model/rpn/rpn.py
+++ b/lib/model/rpn/rpn.py
@@ -27,7 +27,7 @@ def __init__(self, din):
         # define the convrelu layers processing input feature map
         self.RPN_Conv = nn.Conv2d(self.din, 512, 3, 1, 1, bias=True)
 
-        # define bg/fg classifcation score layer
+        # define bg/fg classification score layer
         self.nc_score_out = len(self.anchor_scales) * len(self.anchor_ratios) * 2 # 2(bg/fg) * 9 (anchors)
         self.RPN_cls_score = nn.Conv2d(512, self.nc_score_out, 1, 1, 0)