diff --git a/common/predictive-text/worker/models/dummy-model.ts b/common/predictive-text/worker/models/dummy-model.ts
index 214a684ba4..ce0a97b1b7 100644
--- a/common/predictive-text/worker/models/dummy-model.ts
+++ b/common/predictive-text/worker/models/dummy-model.ts
@@ -82,6 +82,11 @@ namespace models {
       }
     }
 
+    tokenize(context: Context): USVString[] {
+      let words = wordBreakers.default_(context.left);
+      return words.map(span => span.text);
+    }
+
     wordbreak(context: Context): USVString {
       let words = wordBreakers.default_(context.left);
       if (words.length > 0) {