diff --git a/site/content/tutorial/09-motion/02-spring/app-a/App.svelte b/site/content/tutorial/09-motion/02-spring/app-a/App.svelte
index 813c6366b1..ef538f83f6 100644
--- a/site/content/tutorial/09-motion/02-spring/app-a/App.svelte
+++ b/site/content/tutorial/09-motion/02-spring/app-a/App.svelte
@@ -12,12 +12,12 @@
 
 <div style="position: absolute; right: 1em;">
 	<label>
-		<h3>stiffness ({coords.stiffness})</h3>
+		<h3>stiffness ({coords.stiffness || 0})</h3>
 		<input bind:value={coords.stiffness} type="range" min="0" max="1" step="0.01">
 	</label>
 
 	<label>
-		<h3>damping ({coords.damping})</h3>
+		<h3>damping ({coords.damping || 0})</h3>
 		<input bind:value={coords.damping} type="range" min="0" max="1" step="0.01">
 	</label>
 </div>
@@ -28,4 +28,4 @@
 	on:mouseup="{() => size.set(10)}"
 >
 	<circle cx={$coords.x} cy={$coords.y} r={$size}/>
-</svg>
\ No newline at end of file
+</svg>