diff --git a/Library/Homebrew/formulary.rb b/Library/Homebrew/formulary.rb
index 095d5f883f..f95f9c51a2 100644
--- a/Library/Homebrew/formulary.rb
+++ b/Library/Homebrew/formulary.rb
@@ -79,7 +79,7 @@ class Formulary
 
     # Gets the formula instance.
     def get_formula(spec)
-      klass.new(name, path, spec, install_name: install_name)
+      klass.new(name, path, spec, :install_name => install_name)
     end
 
     def klass
diff --git a/Library/Homebrew/test/test_formula.rb b/Library/Homebrew/test/test_formula.rb
index 1ea1ff1853..b70ecbb6fc 100644
--- a/Library/Homebrew/test/test_formula.rb
+++ b/Library/Homebrew/test/test_formula.rb
@@ -10,7 +10,7 @@ class FormulaTests < Homebrew::TestCase
     spec = :stable
     install_name = "formula_alias"
 
-    f = klass.new(name, path, spec, install_name: install_name)
+    f = klass.new(name, path, spec, :install_name => install_name)
     assert_equal name, f.name
     assert_equal path, f.path
     assert_equal install_name, f.install_name
@@ -23,7 +23,7 @@ class FormulaTests < Homebrew::TestCase
     spec = :stable
     install_name = "formula_alias"
 
-    f = Testball.new(name, path, spec, install_name: install_name)
+    f = Testball.new(name, path, spec, :install_name => install_name)
     assert_equal f.install_name, f.install_ref
   end