diff --git a/lib/ftp.c b/lib/ftp.c
index cd067e0..b1f61f9 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -214,8 +214,10 @@ static CURLcode AllowServerConnect(struct connectdata *conn)
       socklen_t size = (socklen_t) sizeof(struct sockaddr_in);
       struct sockaddr_in add;
 
-      if(0 == getsockname(sock, (struct sockaddr *) &add, &size))
+      if(0 == getsockname(sock, (struct sockaddr *) &add, &size)) {
+        size = sizeof(add);
         s=accept(sock, (struct sockaddr *) &add, &size);
+      }
 
       sclose(sock); /* close the first socket */