diff --git a/bin/named/config.c b/bin/named/config.c
index d2af0ec922..0e44c5d639 100644
--- a/bin/named/config.c
+++ b/bin/named/config.c
@@ -855,6 +855,7 @@ named_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
 		isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 
 	INSIST(keycount == addrcount);
+	INSIST(keycount == dscpcount);
 
 	ipkl->addrs = addrs;
 	ipkl->dscps = dscps;