Index: head/devel/rubygem-listen/Makefile
===================================================================
--- head/devel/rubygem-listen/Makefile
+++ head/devel/rubygem-listen/Makefile
@@ -14,7 +14,8 @@
 
 RUN_DEPENDS=	rubygem-rb-fsevent>=0.9.4:devel/rubygem-rb-fsevent \
 		rubygem-rb-inotify>=0.9.7:devel/rubygem-rb-inotify \
-		rubygem-rb-kqueue>=0.2:devel/rubygem-rb-kqueue
+		rubygem-rb-kqueue>=0.2:devel/rubygem-rb-kqueue \
+		rubygem-ruby_dep>=1.2:devel/rubygem-ruby_dep
 
 NO_ARCH=	yes
 USE_RUBY=	yes