diff --git a/lang/ruby/Makefile b/lang/ruby/Makefile
index 04c8a1697..788d136ce 100644
--- a/lang/ruby/Makefile
+++ b/lang/ruby/Makefile
@@ -63,7 +63,7 @@ $(call Package/ruby/Default)
   SECTION:=libs
   CATEGORY:=Libraries
   TITLE+= (shared library)
-  DEPENDS+= +libpthread
+  DEPENDS+= +libpthread +librt
 endef
 
 # Ongoing work to break up ruby's standard library into coherent pieces