diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 18a41e7506..9946d4ad44 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -315,6 +315,9 @@ class FormulaInstaller
       end
     end
 
+    # Merge the repeated dependencies, which may have different tags.
+    deps = Dependency.merge_repeats(deps)
+
     [unsatisfied_reqs, deps]
   end