diff --git a/src/utils/parser/index.js b/src/utils/parser/index.js
index 6b7ee98bbf..d835cfbe6a 100644
--- a/src/utils/parser/index.js
+++ b/src/utils/parser/index.js
@@ -1,11 +1,11 @@
 // @flow
 
 import { workerUtils } from "devtools-utils";
-import { getClosestExpression } from "./utils/closest";
 const { WorkerDispatcher } = workerUtils;
 
 const dispatcher = new WorkerDispatcher();
 
+const getClosestExpression = dispatcher.task("getClosestExpression");
 const getSymbols = dispatcher.task("getSymbols");
 const getVariablesInScope = dispatcher.task("getVariablesInScope");
 const getOutOfScopeLocations = dispatcher.task("getOutOfScopeLocations");
diff --git a/src/utils/parser/worker.js b/src/utils/parser/worker.js
index 9bb4997852..374ba3c196 100644
--- a/src/utils/parser/worker.js
+++ b/src/utils/parser/worker.js
@@ -1,3 +1,4 @@
+import { getClosestExpression } from "./utils/closest";
 import { getVariablesInScope } from "./scopes";
 import getSymbols from "./getSymbols";
 import getOutOfScopeLocations from "./getOutOfScopeLocations";
@@ -6,6 +7,7 @@ import { workerUtils } from "devtools-utils";
 const { workerHandler } = workerUtils;
 
 self.onmessage = workerHandler({
+  getClosestExpression,
   getOutOfScopeLocations,
   getSymbols,
   getVariablesInScope