diff --git a/Library/Homebrew/development_tools.rb b/Library/Homebrew/development_tools.rb
index 456a156871..bec90038b1 100644
--- a/Library/Homebrew/development_tools.rb
+++ b/Library/Homebrew/development_tools.rb
@@ -78,7 +78,7 @@ class DevelopmentTools
         path = HOMEBREW_PREFIX/"opt/gcc/bin"/cc
         path = locate(cc) unless path.exist?
         version = if path &&
-                     build_version = `#{path} --version`[/gcc(?:(?:-\d(?:\.\d)?)? \(.+\))? (\d+\.\d\.\d)/, 1]
+                     build_version = `#{path} --version`[/gcc(?:(?:-\d+(?:\.\d)?)? \(.+\))? (\d+\.\d\.\d)/, 1]
           Version.new build_version
         else
           Version::NULL