diff --git a/kasmweb/core/decoders/tight.js b/kasmweb/core/decoders/tight.js
index 98f9424..7b4b1db 100644
--- a/kasmweb/core/decoders/tight.js
+++ b/kasmweb/core/decoders/tight.js
@@ -59,7 +59,7 @@ export default class TightDecoder {
         } else if (this._ctl === 0x0B) {
             ret = this._webpRect(x, y, width, height,
                                 sock, display, depth);
-        } else if ((this._ctl & 0x80) == 0) {
+        } else if ((this._ctl & 0x08) == 0) {
             ret = this._basicRect(this._ctl, x, y, width, height,
                                   sock, display, depth);
         } else {