diff --git a/src/actions/breakpoints/breakpointPositions.js b/src/actions/breakpoints/breakpointPositions.js
index <HASH>..<HASH> 100644
--- a/src/actions/breakpoints/breakpointPositions.js
+++ b/src/actions/breakpoints/breakpointPositions.js
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
+// @flow
+
 import {
   getSourceActors,
   getBreakpointPositionsForLine
Add flow type to breakpointPositions (#<I>)