1 files changed, 1 insertions, 1 deletions
diff --git a/lib/tsort.rb b/lib/tsort.rb
index 2c3c4b2c4e..0dd68c6b8a 100644
--- a/lib/tsort.rb
+++ b/lib/tsort.rb
@@ -184,7 +184,7 @@ module TSort
       if component.size == 1
         yield component.first
       else
-        raise Cyclic.new "topological sort failed: #{component.inspect}"
+        raise Cyclic.new("topological sort failed: #{component.inspect}")
       end
     }
   end