diff --git a/Tutorial:Screen,-colors-and-squares.md b/Tutorial:Screen,-colors-and-squares.md
index ec98de8..4a54b49 100644
--- a/Tutorial:Screen,-colors-and-squares.md
+++ b/Tutorial:Screen,-colors-and-squares.md
@@ -14,8 +14,8 @@ import (
 
 func update(screen *ebiten.Image) error {
     // Display the text though the debug function
-    ebitenutil.DebugPrint(screen, "Our first game in Ebiten!")
-    
+    if err := ebitenutil.DebugPrint(screen, "Our first game in Ebiten!"); err != nil {
+    }
     return nil
 }