diff --git a/lib/murmurHash3js.js b/lib/murmurHash3js.js
index e869076..bd294f9 100644
--- a/lib/murmurHash3js.js
+++ b/lib/murmurHash3js.js
@@ -27,7 +27,7 @@
         // 32bit int.
         //
 
-        return ((m & 0xffff) * n) + ((((m >>> 16) * n) & 0xffff) << 16);
+        return ((m & 0xffff) * n) + (((((m >>> 16) * n) & 0xffff) << 16) >>> 0);
     }
 
     function _x86Rotl(m, n) {
@@ -36,7 +36,7 @@
         // returns the 32bit int rotated left by that number of positions.
         //
 
-        return (m << n) | (m >>> (32 - n));
+        return ((m << n) >>> 0) | (m >>> (32 - n));
     }
 
     function _x86Fmix(h) {
@@ -206,7 +206,7 @@
         var c2 = 0x1b873593;
 
         for (var i = 0; i < bytes; i = i + 4) {
-            k1 = ((key.charCodeAt(i) & 0xff)) | ((key.charCodeAt(i + 1) & 0xff) << 8) | ((key.charCodeAt(i + 2) & 0xff) << 16) | ((key.charCodeAt(i + 3) & 0xff) << 24);
+            k1 = (((key.charCodeAt(i) & 0xff)) | ((key.charCodeAt(i + 1) & 0xff) << 8) | ((key.charCodeAt(i + 2) & 0xff) << 16) | ((key.charCodeAt(i + 3) & 0xff) << 24)) >>> 0;
 
             k1 = _x86Multiply(k1, c1);
             k1 = _x86Rotl(k1, 15);