diff --git a/etc/rc b/etc/rc
index 5ebc9d2f57..5b51e58019 100755
--- a/etc/rc
+++ b/etc/rc
@@ -261,6 +261,7 @@ extension=posix.so
 extension=radius.so
 extension=readline.so
 extension=session.so
+extension=sysvsem.so
 extension=tokenizer.so
 extension=xml.so