diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index 69e5978c3c..57f69c8c51 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -54,7 +54,7 @@ class DependencyCollector
       parse_string_spec(spec, tag)
     when Symbol
       parse_symbol_spec(spec, tag)
-    when Dependency, Requirement
+    when Requirement, Dependency
       spec
     when Class
       parse_class_spec(spec, tag)