diff --git a/src/openvpnserv/interactive.c b/src/openvpnserv/interactive.c
index 484f27c..4a8d0b5 100644
--- a/src/openvpnserv/interactive.c
+++ b/src/openvpnserv/interactive.c
@@ -2151,7 +2151,7 @@
     if (!strchr(addrs, '.') && IsDhcpEnabled(itf_key))
     {
         s = *size;
-        RegGetValueA(itf_key, NULL, "DhcpNameServer", RRF_RT_REG_SZ, NULL, (PBYTE)addrs, &s);
+        err = RegGetValueA(itf_key, NULL, "DhcpNameServer", RRF_RT_REG_SZ, NULL, (PBYTE)addrs, &s);
         if (err)
         {
             *size = 0;