diff --git a/src/helpers.js b/src/helpers.js
index 268cf5496..1f6f436d7 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -190,7 +190,8 @@ export function fixPath(path) {
  * @returns {object} List of child objects
  */
 function buildChildList(state, list, p) {
-  return mapValues(list, (val, key) => {
+  const mapFn = Array.isArray(list) ? map : mapValues
+  return mapFn(list, (val, key) => {
     let getKey = val
     // Handle key: true lists
     if (val === true || p.populateByKey) {
diff --git a/test/mockData.js b/test/mockData.js
index 3bb295114..8bf459717 100644
--- a/test/mockData.js
+++ b/test/mockData.js
@@ -11,7 +11,8 @@ export const exampleData = {
         collaborators: {
           ABC: true,
           abc: true
-        }
+        },
+        userRank: ['user2', 'ABC']
       },
       GHI: {
         owner: 'ABC',
@@ -59,6 +60,9 @@ export const exampleData = {
     users: {
       ABC: {
         displayName: 'scott'
+      },
+      user2: {
+        displayName: 'User2Name'
       }
     },
     categories: {
diff --git a/test/unit/helpers.spec.js b/test/unit/helpers.spec.js
index e98788401..ce989af2d 100644
--- a/test/unit/helpers.spec.js
+++ b/test/unit/helpers.spec.js
@@ -153,7 +153,7 @@ describe('Helpers:', () => {
           rootName = 'users'
         })
 
-        it('populates values', () => {
+        it('populates values by rtdb or firestore Map type', () => {
           path = 'projects/OKF'
           populates = [{ child: 'collaborators', root: rootName }]
           const populatedData = helpers.populate(exampleData, path, populates)
@@ -162,6 +162,17 @@ describe('Helpers:', () => {
             exampleData.data[rootName].ABC.displayName
           )
         })
+
+        it('populates values by firestore List type', () => {
+          path = 'projects/CDF'
+          populates = [{ child: 'userRank', root: rootName }]
+          const populatedData = helpers.populate(exampleData, path, populates)
+          expect(populatedData.userRank).to.be.instanceof(Array)
+          expect(populatedData).to.have.deep.property(
+            `userRank.0.displayName`,
+            exampleData.data[rootName].user2.displayName
+          )
+        })
       })
 
       describe('config as function -', () => {