diff --git a/server/thread.c b/server/thread.c
index 50d694098b8..97860ee5ac4 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -1047,6 +1047,8 @@ int thread_add_inflight_fd( struct thread *thread, int client, int server )
             thread->inflight[i].server = server;
             return i;
         }
+
+    close( server );
     return -1;
 }