diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index 08b5fc12bd..ef3a712e96 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -136,9 +136,7 @@ class DependencyCollector
   end
 
   def ant_dep(spec, tags)
-    if MacOS.version >= :mavericks
-      Dependency.new(spec.to_s, tags)
-    end
+    Dependency.new(spec.to_s, tags)
   end
 
   def resource_dep(spec, tags)
@@ -175,3 +173,5 @@ class DependencyCollector
     end
   end
 end
+
+require "extend/os/dependency_collector"
diff --git a/Library/Homebrew/extend/os/dependency_collector.rb b/Library/Homebrew/extend/os/dependency_collector.rb
new file mode 100644
index 0000000000..d295263f62
--- /dev/null
+++ b/Library/Homebrew/extend/os/dependency_collector.rb
@@ -0,0 +1,5 @@
+require "dependency_collector"
+
+if OS.mac?
+  require "extend/os/mac/dependency_collector"
+end
diff --git a/Library/Homebrew/extend/os/mac/dependency_collector.rb b/Library/Homebrew/extend/os/mac/dependency_collector.rb
new file mode 100644
index 0000000000..ee98045b64
--- /dev/null
+++ b/Library/Homebrew/extend/os/mac/dependency_collector.rb
@@ -0,0 +1,6 @@
+class DependencyCollector
+  def ant_dep(spec, tags)
+    return if MacOS.version < :mavericks
+    Dependency.new(spec.to_s, tags)
+  end
+end
diff --git a/Library/Homebrew/test/test_dependency_collector.rb b/Library/Homebrew/test/test_dependency_collector.rb
index a94b4959e8..4e87c85157 100644
--- a/Library/Homebrew/test/test_dependency_collector.rb
+++ b/Library/Homebrew/test/test_dependency_collector.rb
@@ -76,6 +76,11 @@ class DependencyCollectorTests < Homebrew::TestCase
     assert_predicate dep, :optional?
   end
 
+  def test_ant_dep
+    @d.add ant: :build
+    assert_equal find_dependency("ant"), Dependency.new("ant", [:build])
+  end
+
   def test_raises_typeerror_for_unknown_classes
     assert_raises(TypeError) { @d.add(Class.new) }
   end
diff --git a/Library/Homebrew/test/test_os_mac_dependency_collector.rb b/Library/Homebrew/test/test_os_mac_dependency_collector.rb
index 37b6191015..05b466c945 100644
--- a/Library/Homebrew/test/test_os_mac_dependency_collector.rb
+++ b/Library/Homebrew/test/test_os_mac_dependency_collector.rb
@@ -2,6 +2,10 @@ require "testing_env"
 require "dependency_collector"
 
 class OSMacDependencyCollectorTests < Homebrew::TestCase
+  def find_dependency(name)
+    @d.deps.find { |dep| dep.name == name }
+  end
+
   def setup
     @d = DependencyCollector.new
   end
@@ -19,4 +23,16 @@ class OSMacDependencyCollectorTests < Homebrew::TestCase
     MacOS.stubs(:version).returns(MacOS::Version.new("10.5"))
     assert_nil @d.build(:ld64)
   end
+
+  def test_ant_dep_mavericks_or_newer
+    MacOS.stubs(:version).returns(MacOS::Version.new("10.9"))
+    @d.add ant: :build
+    assert_equal find_dependency("ant"), Dependency.new("ant", [:build])
+  end
+
+  def test_ant_dep_pre_mavericks
+    MacOS.stubs(:version).returns(MacOS::Version.new("10.7"))
+    @d.add ant: :build
+    assert_nil find_dependency("ant")
+  end
 end