diff --git a/pixelgl/window.go b/pixelgl/window.go
index f844dbca92d494ea4b7a0bb72d5455cbf4e62319..b384c384ad94edfbb17617e33db8725e609f518c 100644
--- a/pixelgl/window.go
+++ b/pixelgl/window.go
@@ -17,7 +17,7 @@ import (
 //
 // Note that you always need to set the Bounds of the Window.
 type WindowConfig struct {
-	// Title at the top of the Window
+	// Title at the top of the Window.
 	Title string
 
 	// Bounds specify the bounds of the Window in pixels.