diff --git a/js/bloom.js b/js/bloom.js
index 39dff2d..4bf381a 100644
--- a/js/bloom.js
+++ b/js/bloom.js
@@ -134,9 +134,9 @@
         }
         // From http://home.comcast.net/~bretm/hash/6.html
         a += a << 13;
-        a ^= a >> 7;
+        a ^= a >>> 7;
         a += a << 3;
-        a ^= a >> 17;
+        a ^= a >>> 17;
         a += a << 5;
         return a & 0xffffffff;
     }
@@ -144,9 +144,9 @@
     function fnv_1a_b(a) {
         a += (a << 1) + (a << 4) + (a << 7) + (a << 8) + (a << 24);
         a += a << 13;
-        a ^= a >> 7;
+        a ^= a >>> 7;
         a += a << 3;
-        a ^= a >> 17;
+        a ^= a >>> 17;
         a += a << 5;
         return a & 0xffffffff;
     }