diff --git a/src/resolvers.c b/src/resolvers.c
index 1704d72..3b9a246 100644
--- a/src/resolvers.c
+++ b/src/resolvers.c
@@ -2470,6 +2470,8 @@
 				err_code |= (ERR_ALERT|ERR_ABORT);
 				continue;
 			}
+
+			srv->flags |= SRV_F_NON_PURGEABLE;
 		}
 	}