diff --git a/common/predictive-text/unit_tests/headless/join-word-breaker.js b/common/predictive-text/unit_tests/headless/join-word-breaker.js
index 79a4be7041..534def4457 100644
--- a/common/predictive-text/unit_tests/headless/join-word-breaker.js
+++ b/common/predictive-text/unit_tests/headless/join-word-breaker.js
@@ -1,11 +1,11 @@
 var assert = require('chai').assert;
 
 var defaultWordBreaker = require('../../build/intermediate').wordBreakers['default'];
-var joinWordBreaker = require('../../build/intermediate').wordBreakers['--join-word'];
+var decorateWithJoin = require('../../build/intermediate').wordBreakers['join_'];
 
 describe('The join word breaker decorator', function () {
   it('should decorate an existing word breaker', function () {
-    let breakWords = joinWordBreaker(defaultWordBreaker);
+    let breakWords = decorateWithJoin(defaultWordBreaker, ['-']);
     assert.isFunction(breakWords);
   });
 });
\ No newline at end of file
diff --git a/common/predictive-text/worker/word_breaking/join-word-breaker-decorator.ts b/common/predictive-text/worker/word_breaking/join-word-breaker-decorator.ts
new file mode 100644
index 0000000000..f69e441c84
--- /dev/null
+++ b/common/predictive-text/worker/word_breaking/join-word-breaker-decorator.ts
@@ -0,0 +1,7 @@
+namespace wordBreakers {
+  export function join_(breaker: WordBreakingFunction, joiners: string[]): WordBreakingFunction {
+    return function (s: string): Span[] {
+      return [];
+    }
+  }
+}
\ No newline at end of file