diff --git a/src/add-ons/kernel/network/datalink_protocols/arp/arp.cpp b/src/add-ons/kernel/network/datalink_protocols/arp/arp.cpp
index ff52246475..9a5d402e30 100644
--- a/src/add-ons/kernel/network/datalink_protocols/arp/arp.cpp
+++ b/src/add-ons/kernel/network/datalink_protocols/arp/arp.cpp
@@ -960,6 +960,7 @@ arp_init()
 static status_t
 arp_uninit()
 {
+	ASSERT(sCache->IsEmpty());
 	unregister_generic_syscall(ARP_SYSCALLS, 1);
 	return B_OK;
 }