diff --git a/src/shrpx_spdy_upstream.cc b/src/shrpx_spdy_upstream.cc
index 403140c3..ec10fab0 100644
--- a/src/shrpx_spdy_upstream.cc
+++ b/src/shrpx_spdy_upstream.cc
@@ -185,7 +185,7 @@ void on_ctrl_recv_callback
       return;
     }
     // Require content-length if FIN flag is not set.
-    if(strcmp("CONNECT", method) == 0 &&
+    if(strcmp("CONNECT", method) != 0 &&
        (frame->syn_stream.hd.flags & SPDYLAY_CTRL_FLAG_FIN) == 0 &&
        !content_length) {
       upstream->rst_stream(downstream, SPDYLAY_PROTOCOL_ERROR);