diff --git a/CHANGES b/CHANGES
index 29506fb8aa..01b269a053 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+5872.	[bug]		udp_recv() in dispatch could trigger an INSIST when the
+			callback's result indicated success but the response
+			was canceled in the meantime. [GL #3300]
+
 5866.	[bug]		Work around a jemalloc quirk which could trigger an
 			out-of-memory condition in named over time. [GL #3287]
 
diff --git a/lib/dns/dispatch.c b/lib/dns/dispatch.c
index 7544a4dba2..ce605f0c6c 100644
--- a/lib/dns/dispatch.c
+++ b/lib/dns/dispatch.c
@@ -491,6 +491,8 @@ udp_recv(isc_nmhandle_t *handle, isc_result_t eresult, isc_region_t *region,
 	 */
 	if (ISC_LINK_LINKED(resp, alink)) {
 		response = resp->response;
+	} else if (eresult == ISC_R_SUCCESS) {
+		eresult = ISC_R_CANCELED;
 	}
 
 	if (eresult != ISC_R_SUCCESS) {
@@ -503,8 +505,6 @@ udp_recv(isc_nmhandle_t *handle, isc_result_t eresult, isc_region_t *region,
 		goto done;
 	}
 
-	INSIST(ISC_LINK_LINKED(resp, alink));
-
 	peer = isc_nmhandle_peeraddr(handle);
 	isc_netaddr_fromsockaddr(&netaddr, &peer);