diff --git a/tests/libqtest.c b/tests/libqtest.c
index 6d333ef0ac..1d73fd1953 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -74,6 +74,7 @@ static int socket_accept(int sock)
     socklen_t addrlen;
     int ret;
 
+    addrlen = sizeof(addr);
     do {
         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
     } while (ret == -1 && errno == EINTR);