diff --git a/lib/hash/wasm-hash.js b/lib/hash/wasm-hash.js
index 68c64ad..bbe999a 100644
--- a/lib/hash/wasm-hash.js
+++ b/lib/hash/wasm-hash.js
@@ -82,7 +82,7 @@ class WasmHash {
             endPos += 2;
           } else {
             // bail-out for weird chars
-            endPos += mem.write(data.slice(endPos), endPos, encoding);
+            endPos += mem.write(data.slice(i), endPos, encoding);
             break;
           }
         }