diff --git a/web/src/engine/predictive-text/worker-thread/src/main/correction/search-quotient-node.ts b/web/src/engine/predictive-text/worker-thread/src/main/correction/search-quotient-node.ts
index 6a2c12d1ee..12fdf9a150 100644
--- a/web/src/engine/predictive-text/worker-thread/src/main/correction/search-quotient-node.ts
+++ b/web/src/engine/predictive-text/worker-thread/src/main/correction/search-quotient-node.ts
@@ -51,7 +51,7 @@ export interface InputSegment {
   /**
    * The transform / transition ID of the corresponding input event.
    */
-  transitionId: number,
+  transitionId: number | undefined,
 
   /**
    * Marks the initial index (inclusive) within the insert strings for the