diff --git a/common/web/input-processor/src/text/prediction/predictionContext.ts b/common/web/input-processor/src/text/prediction/predictionContext.ts
index 7578545b985..eebccb0fe3e 100644
--- a/common/web/input-processor/src/text/prediction/predictionContext.ts
+++ b/common/web/input-processor/src/text/prediction/predictionContext.ts
@@ -172,7 +172,7 @@ export default class PredictionContext extends EventEmitter<PredictionContextEve
    * @param suggestion Either a `Suggestion` or `Reversion`.
    * @returns if `suggestion` is a `Suggestion`, will return a `Promise<Reversion>`; else, `null`.
    */
-  public accept(suggestion: Suggestion): Promise<Reversion> | null {
+  public accept(suggestion: Suggestion): Promise<Reversion> | Promise<null> {
     let _this = this;
 
     // Selecting a suggestion or a reversion should both clear selection
@@ -188,7 +188,8 @@ export default class PredictionContext extends EventEmitter<PredictionContextEve
         this.recentAccept = false;
         this.recentRevert = true;
       }
-      return null;
+
+      return Promise.resolve(null);
     }
 
     this.revertAcceptancePromise.then(function(suggestion) {
diff --git a/common/web/input-processor/tests/cases/predictionContext.js b/common/web/input-processor/tests/cases/predictionContext.js
index 34131c82dd8..3b629092d24 100644
--- a/common/web/input-processor/tests/cases/predictionContext.js
+++ b/common/web/input-processor/tests/cases/predictionContext.js
@@ -282,7 +282,7 @@ describe("PredictionContext", () => {
     });
 
     // And now, apply the reversion itself.
-    let returnValue = predictiveContext.accept(reversion);
+    let returnValue = await predictiveContext.accept(reversion);
 
     // 'accepting' a reversion performs a rewind; there's no need for async ops here.
     assert.isNull(returnValue); // as per the method's spec.