diff --git a/servers/slapd/overlays/syncprov.c b/servers/slapd/overlays/syncprov.c
index 01602a79fa..a776229b7d 100644
--- a/servers/slapd/overlays/syncprov.c
+++ b/servers/slapd/overlays/syncprov.c
@@ -1619,6 +1619,10 @@ syncprov_op_response( Operation *op, SlapReply *rs )
 					sizeof(int));
 				si->si_sids[i] = sid;
 			}
+		} else {
+			/* internal ops that aren't meant to be replicated */
+			ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
+			return SLAP_CB_CONTINUE;
 		}
 
 		/* Don't do any processing for consumer contextCSN updates */