diff --git a/Library/Homebrew/utils/pypi.rb b/Library/Homebrew/utils/pypi.rb
index 7199dcce0f..42f4a8727c 100644
--- a/Library/Homebrew/utils/pypi.rb
+++ b/Library/Homebrew/utils/pypi.rb
@@ -333,7 +333,7 @@ module PyPI
       EOS
     end
 
-    odie "Excluded superfluous packages: #{", ".join(exclude_packages)}" if exclude_packages.any?
+    odie "Excluded superfluous packages: #{exclude_packages.join(", ")}" if exclude_packages.any?
 
     if print_only
       puts new_resource_blocks.chomp