diff --git a/src/elements.ts b/src/elements.ts
index f9290ff2d..c81b327e9 100644
--- a/src/elements.ts
+++ b/src/elements.ts
@@ -37,6 +37,7 @@ export interface PrimerProp {
   color?: string;
   direction: 1 | -1;
   end: number;
+  id?: string;
   name: string;
   start: number;
 }