diff --git a/classes/submission/maps/Schema.php b/classes/submission/maps/Schema.php
index 12f2097c384..fba0dc73b31 100644
--- a/classes/submission/maps/Schema.php
+++ b/classes/submission/maps/Schema.php
@@ -15,6 +15,7 @@
 
 use APP\core\Application;
 use APP\submission\Submission;
+use PKP\submission\PKPSubmission;
 
 class Schema extends \PKP\submission\maps\Schema
 {
@@ -36,6 +37,11 @@ protected function mapByProperties(array $props, Submission $submission): array
             );
         }
 
+        if (in_array('scheduledIn', $props)) {
+            $output['scheduledIn'] = $submission->getData('status') == PKPSubmission::STATUS_SCHEDULED ?
+                $submission->getCurrentPublication()->getData('issueId') : null;
+        }
+
         $locales = $this->context->getSupportedSubmissionMetadataLocales();
 
         if (!in_array($primaryLocale = $submission->getData('locale'), $locales)) {
@@ -48,4 +54,11 @@ protected function mapByProperties(array $props, Submission $submission): array
 
         return $this->withExtensions($output, $submission);
     }
+
+    protected function appSpecificProps(): array
+    {
+        return [
+            'scheduledIn',
+        ];
+    }
 }
diff --git a/lib/pkp b/lib/pkp
index f29ce267fba..4c0c5a758f8 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit f29ce267fbacc8d9285f0454079a50fabf44b235
+Subproject commit 4c0c5a758f85347d224546e67dcd3c9f30bfde0a
diff --git a/schemas/submission.json b/schemas/submission.json
index 1f98d04049b..56d02dc6a11 100644
--- a/schemas/submission.json
+++ b/schemas/submission.json
@@ -9,6 +9,15 @@
 			"type": "integer",
 			"description": "The section this submission should be assigned to. This can only be passed when creating a new submission and the data is assigned to the first publication. After the submission is created, edit the publication to change the `sectionId`.",
 			"writeOnly": true
+		},
+		"scheduledIn": {
+			"type": "integer",
+			"description": "The submission status is `STATUS_SCHEDULED`. It shows the issue it is scheduled in.",
+			"apiSummary": true,
+			"readOnly": true,
+			"validation": [
+				"nullable"
+			]
 		}
 	}
 }