diff --git a/Libraries/Lists/FlatList.js b/Libraries/Lists/FlatList.js
index adebd267f7f..9923574c789 100644
--- a/Libraries/Lists/FlatList.js
+++ b/Libraries/Lists/FlatList.js
@@ -524,8 +524,9 @@ class FlatList<ItemT> extends React.PureComponent<Props<ItemT>, void> {
       // comparison.
       if (!this._hasWarnedLegacy) {
         console.warn(
-          'FlatList: Using legacyImplementation - some features not supported and performance ' +
-            'may suffer',
+          'FlatList: legacyImplementation is deprecated and will be removed in a ' +
+            'future release - some features not supported and performance may suffer. ' +
+            'Please migrate to the default implementation.',
         );
         this._hasWarnedLegacy = true;
       }