diff --git a/src/openvpnserv/interactive.c b/src/openvpnserv/interactive.c
index 577d89c..58f1e02 100644
--- a/src/openvpnserv/interactive.c
+++ b/src/openvpnserv/interactive.c
@@ -1873,7 +1873,7 @@
             {
                 RtlIpv4AddressToStringA(&msg->addr[i].ipv4, addrs + offset);
             }
-            offset += strlen(addrs);
+            offset = strlen(addrs);
         }
 
         err = SetNameServers(iid, msg->family, addrs);