diff --git a/ChangeLog b/ChangeLog
index e74aa9d283..8695ef9d9b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue May 10 10:53:04 2011  Eric Hodel  <drbrain@segment7.net>
+
+	* common.mk (rdoc): Add rdoc-coverage rule
+
 Tue May 10 09:13:21 2011  Eric Hodel  <drbrain@segment7.net>
 
 	* lib/webrick: Add Documentation
diff --git a/common.mk b/common.mk
index 9f6f605da8..205051da4a 100644
--- a/common.mk
+++ b/common.mk
@@ -400,6 +400,10 @@ post-install-doc::
 rdoc: PHONY main
 	@echo Generating RDoc documentation
 	$(Q) $(XRUBY) "$(srcdir)/bin/rdoc" --encoding=UTF-8 --no-force-update --all --ri --op "$(RDOCOUT)" $(RDOCFLAGS) "$(srcdir)"
+rdoc-coverage: PHONY main
+	@echo Generating RDoc coverage report
+	$(Q) $(XRUBY) "$(srcdir)/bin/rdoc" --all -C $(RDOCFLAGS) "$(srcdir)"
+rdoc-coverage: PHONY main
 nodoc: PHONY
 
 what-where-doc: no-install-doc