diff --git a/conev.h b/conev.h
index eed9079..4a8d928 100644
--- a/conev.h
+++ b/conev.h
@@ -68,7 +68,7 @@ struct buffer {
 struct eval {
     int fd;    
     int index;
-    unsigned int mod_iter;
+    unsigned long long mod_iter;
     enum eid type;
     struct eval *pair;
     struct buffer buff;
@@ -93,7 +93,7 @@ struct poolhd {
 #else
     struct pollfd *pevents;
 #endif
-    unsigned int iters;
+    unsigned long long iters;
 };
 
 struct poolhd *init_pool(int count);
diff --git a/proxy.c b/proxy.c
index 8674131..c20f753 100644
--- a/proxy.c
+++ b/proxy.c
@@ -482,7 +482,7 @@ int udp_associate(struct poolhd *pool,
         return -1;
     }
     struct eval *client = add_event(pool, EV_UDP_TUNNEL, cfd, POLLIN);
-    if (!pair) {
+    if (!client) {
         del_event(pool, pair);
         close(cfd);
         return -1;
@@ -880,7 +880,7 @@ int event_loop(int srvfd)
         }
         assert(val->type >= 0
             && val->type < sizeof(eid_name)/sizeof(*eid_name));
-        LOG(LOG_L, "new event: fd: %d, evt: %s, mod_iter: %d\n", val->fd, eid_name[val->type], val->mod_iter);
+        LOG(LOG_L, "new event: fd: %d, evt: %s, mod_iter: %llu\n", val->fd, eid_name[val->type], val->mod_iter);
         
         switch (val->type) {
             case EV_ACCEPT: