diff --git a/lib/ui/geometry.dart b/lib/ui/geometry.dart
index 23829b3efaacabb2bb3298476bb49751da519515..6d3b1ac5b59363f81dcbf80ad3b27c06c7927223 100644
--- a/lib/ui/geometry.dart
+++ b/lib/ui/geometry.dart
@@ -155,7 +155,7 @@ class Offset extends OffsetBase {
 
   /// The angle of this offset as radians clockwise from the positive x-axis, in
   /// the range -[pi] to [pi], assuming positive values of the x-axis go to the
-  /// left and positive values of the y-axis go down.
+  /// right and positive values of the y-axis go down.
   ///
   /// Zero means that [dy] is zero and [dx] is zero or positive.
   ///