diff --git a/Library/Homebrew/dependency.rb b/Library/Homebrew/dependency.rb
index ca500faefa..c280034a84 100644
--- a/Library/Homebrew/dependency.rb
+++ b/Library/Homebrew/dependency.rb
@@ -95,8 +95,9 @@ class Dependency
         end
       end
 
-      @expand_stack.pop
       merge_repeats(expanded_deps)
+    ensure
+      @expand_stack.pop
     end
 
     def action(dependent, dep, &_block)