diff --git a/feature-group-definitions/long-animation-frame-timing.yaml b/feature-group-definitions/long-animation-frame-timing.yaml
new file mode 100644
index 0000000000..08aeb10437
--- /dev/null
+++ b/feature-group-definitions/long-animation-frame-timing.yaml
@@ -0,0 +1,2 @@
+name: Long animation frame timing
+spec: https://w3c.github.io/longtasks/#sec-loaf-timing