diff --git a/bypy/bypy.py b/bypy/bypy.py
index 9693e56e0f881de2d2a0e4b4f92c71dfe456ae81..9b9f0eaae51ae7b28f3e3ab0302134375a78b3f8 100755
--- a/bypy/bypy.py
+++ b/bypy/bypy.py
@@ -1968,7 +1968,7 @@ try to create a file at PCS by combining slices, having MD5s specified
 					sys.exit(const.EMaxRetry)
 				return const.EMaxRetry
 
-	# requirment: self.__remote_json is already gotten
+	# requirement: self.__remote_json is already gotten
 	def __downchunks(self, rfile, start):
 		rsize = self.__remote_json['size']