diff --git a/common.mk b/common.mk
index 792d62cbf5..6b9eacd100 100644
--- a/common.mk
+++ b/common.mk
@@ -39,10 +39,6 @@ GEM_HOME =
 GEM_PATH =
 GEM_VENDOR =
 
-SPEC_GIT_BASE = git://github.com/ruby
-MSPEC_GIT_URL = $(SPEC_GIT_BASE)/mspec.git
-RUBYSPEC_GIT_URL = $(SPEC_GIT_BASE)/spec.git
-
 SIMPLECOV_GIT_URL = git://github.com/colszowka/simplecov.git
 SIMPLECOV_GIT_REF = v0.10.0
 SIMPLECOV_HTML_GIT_URL = git://github.com/colszowka/simplecov-html.git