diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index da1ff34d32..376cd10fbc 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -1689,7 +1689,7 @@ qemudNetworkIfaceConnect(virConnectPtr conn,
                         tapmac,
                         vnet_hdr,
                         &tapfd))) {
-        if (errno == ENOTSUP) {
+        if (err == ENOTSUP) {
             /* In this particular case, give a better diagnostic. */
             qemuReportError(VIR_ERR_INTERNAL_ERROR,
                             _("Failed to add tap interface to bridge. "