diff --git a/Library/Homebrew/utils/pypi.rb b/Library/Homebrew/utils/pypi.rb
index 527ebcc09c..2162dc4922 100644
--- a/Library/Homebrew/utils/pypi.rb
+++ b/Library/Homebrew/utils/pypi.rb
@@ -28,7 +28,7 @@ module PyPI
         end
         raise ArgumentError, "Package should be a valid PyPI URL" if match.blank?
 
-        @name = match[1]
+        @name = normalize_python_package(match[1])
         @version = match[2]
         return
       end