diff --git a/src/util/macvtap.c b/src/util/macvtap.c
index 736cbaf0349e290bc09c74300ec1ee80ae22cb25..999e670b4feb0e62d20f67b638a65428a542a78b 100644
--- a/src/util/macvtap.c
+++ b/src/util/macvtap.c
@@ -435,13 +435,13 @@ link_add(virConnectPtr conn,
 
 malformed_resp:
     ReportError(conn, VIR_ERR_INTERNAL_ERROR,
-                _("malformed netlink response message"));
+                "%s", _("malformed netlink response message"));
     VIR_FREE(recvbuf);
     return -1;
 
 buffer_too_small:
     ReportError(conn, VIR_ERR_INTERNAL_ERROR,
-                _("internal buffer is too small"));
+                "%s", _("internal buffer is too small"));
     return -1;
 }