diff --git a/packages/flutter/lib/src/material/text_field.dart b/packages/flutter/lib/src/material/text_field.dart
index 72e6b6971f6..e0f92ad1c37 100644
--- a/packages/flutter/lib/src/material/text_field.dart
+++ b/packages/flutter/lib/src/material/text_field.dart
@@ -539,7 +539,8 @@ class TextField extends StatefulWidget {
 
   /// The color to use when painting the cursor.
   ///
-  /// Defaults to the theme's `cursorColor` when null.
+  /// Defaults to [ThemeData.cursorColor] or [CupertinoTheme.primaryColor]
+  /// depending on [ThemeData.platform].
   final Color cursorColor;
 
   /// The appearance of the keyboard.