diff --git a/sample/animometer/main.ts b/sample/animometer/main.ts
index 4d45b2a3..77c38153 100644
--- a/sample/animometer/main.ts
+++ b/sample/animometer/main.ts
@@ -168,7 +168,9 @@ function configure() {
   const alignedUniformFloats =
     alignedUniformBytes / Float32Array.BYTES_PER_ELEMENT;
   const uniformBuffer = device.createBuffer({
-    size: numTriangles * alignedUniformBytes + Float32Array.BYTES_PER_ELEMENT,
+    size:
+      Math.max(numTriangles, 1) * alignedUniformBytes +
+      Float32Array.BYTES_PER_ELEMENT,
     usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.UNIFORM,
   });
   const uniformBufferData = new Float32Array(