diff --git a/packages/react-navigation/docs/api/navigators/StackNavigator.md b/packages/react-navigation/docs/api/navigators/StackNavigator.md
index 1f8852ec..9c49b16e 100644
--- a/packages/react-navigation/docs/api/navigators/StackNavigator.md
+++ b/packages/react-navigation/docs/api/navigators/StackNavigator.md
@@ -106,7 +106,7 @@ String or React Element used by the header. Defaults to scene `title`
 
 #### `headerBackTitle`
 
-Title string used by the back button on iOS or `null` to disable label. Defaults to scene `title`
+Title string used by the back button on iOS, or `null` to disable label. Defaults to the previous scene's `headerTitle`
 
 #### `headerTruncatedBackTitle`