diff --git a/src/or/buffers.c b/src/or/buffers.c
index aaff1df5cc..008babb488 100644
--- a/src/or/buffers.c
+++ b/src/or/buffers.c
@@ -584,6 +584,10 @@ int fetch_from_buf_socks(buf_t *buf, socks_request_t *req) {
       tor_assert(next < buf->mem+buf->datalen);
 
       startaddr = NULL;
+      if (socks4_prot == socks4a && next+1 == buf->mem+buf->datalen) {
+        log_fn(LOG_DEBUG,"socks4: No part of destaddr here yet.");
+        return 0;
+      }
       if (socks4_prot != socks4a && !have_warned_about_unsafe_socks) {
         log_fn(LOG_WARN,"Your application (using socks4 on port %d) is giving Tor only an IP address. Applications that do DNS resolves themselves may leak information. Consider using Socks4A (e.g. via privoxy or socat) instead.", req->port);
 //      have_warned_about_unsafe_socks = 1; // (for now, warn every time)