diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 9f6fc10e83..15420beffe 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -4347,7 +4347,9 @@ Zotero.Item.prototype.toJSON = function (options = {}) {
 	}
 	
 	// My Publications
-	if (this._inPublications || mode == 'full') {
+	if (this._inPublications
+			// Include in 'full' mode, but only in My Library
+			|| (mode == 'full' && this.library && this.library.libraryType == 'user')) {
 		obj.inPublications = this._inPublications;
 	}
 	
diff --git a/test/tests/itemTest.js b/test/tests/itemTest.js
index 4c5251e7c2..918947978f 100644
--- a/test/tests/itemTest.js
+++ b/test/tests/itemTest.js
@@ -1369,11 +1369,18 @@ describe("Zotero.Item", function () {
 				assert.notProperty(json, "inPublications");
 			});
 			
-			it("should include inPublications=false for items not in My Publications in full mode", function* () {
-				var item = createUnsavedDataObject('item');
+			it("should include inPublications=false for personal-library items not in My Publications in full mode", async function () {
+				var item = createUnsavedDataObject('item', { libraryID: Zotero.Libraries.userLibraryID });
 				var json = item.toJSON({ mode: 'full' });
 				assert.property(json, "inPublications", false);
 			});
+			
+			it("shouldn't include inPublications=false for group items not in My Publications in full mode", function* () {
+				var group = yield getGroup();
+				var item = createUnsavedDataObject('item', { libraryID: group.libraryID });
+				var json = item.toJSON({ mode: 'full' });
+				assert.notProperty(json, "inPublications");
+			});
 		})
 		
 		describe("'full' mode", function () {