diff --git a/lib/imap.js b/lib/imap.js
index 76ce23e..0d334ec 100644
--- a/lib/imap.js
+++ b/lib/imap.js
@@ -311,7 +311,7 @@ ImapConnection.prototype.connect = function(loginCb) {
     if (indata.line[0] === '*') { // Untagged server response
       var isUnsolicited =
         (requests[0] && requests[0].cmd === 'NOOP')
-        || (state.isIdle && state.ext.idle.state === IDLE_IDLING);
+        || (state.isIdle && state.ext.idle.state !== IDLE_NONE);
       if (m = XRegExp.exec(indata.line, REX_UNRESPNUM)) {
         // m.type = response type (numeric-based)
         m.type = m.type.toUpperCase();