diff --git a/src/js/strie.js b/src/js/strie.js
index b9b94df22..6a3096fa3 100644
--- a/src/js/strie.js
+++ b/src/js/strie.js
@@ -658,7 +658,7 @@ const roundToPageSize = v => (v + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
                 i += 1;
             }
             haystackLeft += 1;
-            if ( haystackLeft === haystackEnd ) { break; }
+            if ( haystackLeft > haystackEnd ) { break; }
         }
         return -1;
     }
diff --git a/src/js/wasm/biditrie.wasm b/src/js/wasm/biditrie.wasm
index e1de9312c..5bfc6b7d0 100644
Binary files a/src/js/wasm/biditrie.wasm and b/src/js/wasm/biditrie.wasm differ
diff --git a/src/js/wasm/biditrie.wat b/src/js/wasm/biditrie.wat
index 3cd76a618..b98d87951 100644
--- a/src/js/wasm/biditrie.wat
+++ b/src/js/wasm/biditrie.wat
@@ -606,9 +606,9 @@
         i32.const 1
         i32.add
         tee_local $haystackLeft
-        ;; if ( haystackLeft === haystackEnd ) { break; }
+        ;; if ( haystackLeft > haystackEnd ) { break; }
         get_local $haystackEnd
-        i32.eq
+        i32.gt_u
         br_if $fail
         br $mainLoop
     ;; }