diff --git a/Library/Homebrew/extend/os/dependency_collector.rb b/Library/Homebrew/extend/os/dependency_collector.rb
index f3635e3da9..83e9e2b61e 100644
--- a/Library/Homebrew/extend/os/dependency_collector.rb
+++ b/Library/Homebrew/extend/os/dependency_collector.rb
@@ -1,3 +1,5 @@
+require "dependency_collector"
+
 if OS.mac?
   require "extend/os/mac/dependency_collector"
 elsif OS.linux?
diff --git a/Library/Homebrew/extend/os/linux/dependency_collector.rb b/Library/Homebrew/extend/os/linux/dependency_collector.rb
index b7ac9d78ac..37758c307a 100644
--- a/Library/Homebrew/extend/os/linux/dependency_collector.rb
+++ b/Library/Homebrew/extend/os/linux/dependency_collector.rb
@@ -1,3 +1,5 @@
-def ant_dep(spec, tags)
-  Dependency.new(spec.to_s, tags)
+class DependencyCollector
+  def ant_dep(spec, tags)
+    Dependency.new(spec.to_s, tags)
+  end
 end
diff --git a/Library/Homebrew/extend/os/mac/dependency_collector.rb b/Library/Homebrew/extend/os/mac/dependency_collector.rb
index 397eb0e720..76f40d910d 100644
--- a/Library/Homebrew/extend/os/mac/dependency_collector.rb
+++ b/Library/Homebrew/extend/os/mac/dependency_collector.rb
@@ -1,5 +1,7 @@
-def ant_dep(spec, tags)
-  if MacOS.version >= :mavericks
-    Dependency.new(spec.to_s, tags)
+class DependencyCollector
+  def ant_dep(spec, tags)
+    if MacOS.version >= :mavericks
+      Dependency.new(spec.to_s, tags)
+    end
   end
 end