diff --git a/core/rfb.js b/core/rfb.js
index 8ac38aab..b4045e52 100644
--- a/core/rfb.js
+++ b/core/rfb.js
@@ -2491,6 +2491,8 @@ export default class RFB extends EventTargetMixin {
                 this._FBU.width = this._sock.rQshift16();
                 this._FBU.height = this._sock.rQshift16();
                 this._FBU.encoding = this._sock.rQshift32();
+                /* Encodings are signed */
+                this._FBU.encoding >>= 0;
             }
 
             if (!this._handleRect()) {
diff --git a/core/websock.js b/core/websock.js
index 7cd87091..2b9b519a 100644
--- a/core/websock.js
+++ b/core/websock.js
@@ -121,7 +121,7 @@ export default class Websock {
         for (let byte = bytes - 1; byte >= 0; byte--) {
             res += this._rQ[this._rQi++] << (byte * 8);
         }
-        return res;
+        return res >>> 0;
     }
 
     rQshiftStr(len) {