diff --git a/CHANGELOG.md b/CHANGELOG.md
index e69de29bb..3f99216a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -0,0 +1 @@
+- fix(v1): Call onInit for schedule.onRun functions (#1801)
diff --git a/spec/v1/providers/pubsub.spec.ts b/spec/v1/providers/pubsub.spec.ts
index eed99bc85..b115bd22b 100644
--- a/spec/v1/providers/pubsub.spec.ts
+++ b/spec/v1/providers/pubsub.spec.ts
@@ -22,7 +22,7 @@
 
 import { expect } from "chai";
 
-import { LegacyEvent, RESET_VALUE } from "../../../src/v1";
+import { LegacyEvent, RESET_VALUE, onInit } from "../../../src/v1";
 import { MINIMAL_V1_ENDPOINT } from "../../fixtures";
 import { MINIMAL_SCHEDULE_TRIGGER } from "./fixtures";
 import * as functions from "../../../src/v1";
@@ -256,6 +256,32 @@ describe("Pubsub Functions", () => {
         }
       );
 
+      it("should call onInit before executing scheduled function", async () => {
+        const context = {
+          eventId: "00000",
+          timestamp: "2016-11-04T21:29:03.496Z",
+          eventType: "google.pubsub.topic.publish",
+          resource: {
+            service: "pubsub.googleapis.com",
+            name: "projects/project-id/topics/topic-name",
+          },
+        };
+
+        let initCalled = false;
+        onInit(() => {
+          initCalled = true;
+        });
+
+        const scheduledFunc = pubsub.schedule("every 5 minutes").onRun(() => {
+          expect(initCalled).to.be.true;
+          return null;
+        });
+
+        expect(initCalled).to.be.false;
+        await scheduledFunc(null, context);
+        expect(initCalled).to.be.true;
+      });
+
       it("should return an appropriate trigger/endpoint when called with region and options", () => {
         const result = functions
           .region("us-east1")
diff --git a/src/v1/cloud-functions.ts b/src/v1/cloud-functions.ts
index 14ef037b4..7fe9e8741 100644
--- a/src/v1/cloud-functions.ts
+++ b/src/v1/cloud-functions.ts
@@ -393,6 +393,7 @@ export function makeCloudFunction<EventData>({
   triggerResource,
 }: MakeCloudFunctionArgs<EventData>): CloudFunction<EventData> {
   handler = withInit(handler ?? contextOnlyHandler);
+  const wrappedContextOnlyHandler = contextOnlyHandler ? withInit(contextOnlyHandler) : undefined;
   const cloudFunction: any = (data: any, context: any) => {
     if (legacyEventType && context.eventType === legacyEventType) {
       /*
@@ -433,7 +434,7 @@ export function makeCloudFunction<EventData>({
     let promise;
     if (labels && labels["deployment-scheduled"]) {
       // Scheduled function do not have meaningful data, so exclude it
-      promise = contextOnlyHandler(context);
+      promise = wrappedContextOnlyHandler(context);
     } else {
       const dataOrChange = dataConstructor(event);
       promise = handler(dataOrChange, context);