diff --git a/src/transport.c b/src/transport.c
index 43df76c..605e002 100644
--- a/src/transport.c
+++ b/src/transport.c
@@ -708,13 +708,14 @@ _libssh2_transport_write(LIBSSH2_SESSION * session, unsigned char *data,
 
     /* FIRST, check if we have a pending write to complete */
     rc = send_existing(session, data, data_len, &ret);
-    if (rc || ret) {
+    if (rc)
         return rc;
-    }
 
-    /* default clear the bit */
     session->socket_block_directions &= ~LIBSSH2_SESSION_BLOCK_OUTBOUND;
 
+    if (ret)
+        return rc;
+
     encrypted = (session->state & LIBSSH2_STATE_NEWKEYS) ? 1 : 0;
 
     /* check if we should compress */