diff --git a/lib/isc/loop.c b/lib/isc/loop.c
index b77ba534f8..0ab71a0543 100644
--- a/lib/isc/loop.c
+++ b/lib/isc/loop.c
@@ -209,7 +209,7 @@ queue_cb(uv_async_t *handle) {
 }
 
 static void
-loop_init(isc_loop_t *loop, isc_loopmgr_t *loopmgr, size_t tid) {
+loop_init(isc_loop_t *loop, isc_loopmgr_t *loopmgr, uint32_t tid) {
 	*loop = (isc_loop_t){
 		.tid = tid,
 		.loopmgr = loopmgr,
@@ -234,7 +234,10 @@ loop_init(isc_loop_t *loop, isc_loopmgr_t *loopmgr, size_t tid) {
 	UV_RUNTIME_CHECK(uv_async_init, r);
 	uv_handle_set_data(&loop->destroy_trigger, loop);
 
+	char name[16];
+	snprintf(name, sizeof(name), "loop-%08" PRIx32, tid);
 	isc_mem_create(&loop->mctx);
+	isc_mem_setname(loop->mctx, name);
 
 	isc_mutex_init(&loop->queue_lock);