Index: head/sys/dev/ixl/if_ixl.c
===================================================================
--- head/sys/dev/ixl/if_ixl.c
+++ head/sys/dev/ixl/if_ixl.c
@@ -3380,7 +3380,7 @@
 	};
 
 	struct ixl_sysctl_info *entry = ctls;
-	while (entry->stat != 0)
+	while (entry->stat != NULL)
 	{
 		SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, entry->name,
 				CTLFLAG_RD, entry->stat,
@@ -3439,7 +3439,7 @@
 	};
 
 	struct ixl_sysctl_info *entry = ctls;
-	while (entry->stat != 0)
+	while (entry->stat != NULL)
 	{
 		SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, entry->name,
 				CTLFLAG_RD, entry->stat,
Index: head/sys/dev/ixl/if_ixlv.c
===================================================================
--- head/sys/dev/ixl/if_ixlv.c
+++ head/sys/dev/ixl/if_ixlv.c
@@ -2832,7 +2832,7 @@
 		{0,0,0}
 	};
 	struct ixl_sysctl_info *entry = ctls;
-	while (entry->stat != 0)
+	while (entry->stat != NULL)
 	{
 		SYSCTL_ADD_QUAD(ctx, child, OID_AUTO, entry->name,
 				CTLFLAG_RD, entry->stat,