1 files changed, 3 insertions, 3 deletions

diff --git a/src/vs/workbench/contrib/tasks/common/taskConfiguration.ts b/src/vs/workbench/contrib/tasks/common/taskConfiguration.ts
index 7ab00229e89..9c6f0ba9e34 100644
--- a/src/vs/workbench/contrib/tasks/common/taskConfiguration.ts
+++ b/src/vs/workbench/contrib/tasks/common/taskConfiguration.ts
@@ -282,7 +282,7 @@ export interface CommandProperties extends BaseCommandProperties {
 
 export interface GroupKind {
 	kind?: string;
-	isDefault?: boolean;
+	isDefault?: boolean | string;
 }
 
 export interface ConfigurationProperties {
@@ -1245,7 +1245,7 @@ export namespace GroupKind {
 			return { _id: external, isDefault: false };
 		} else if (Types.isString(external.kind) && Tasks.TaskGroup.is(external.kind)) {
 			let group: string = external.kind;
-			let isDefault: boolean = !!external.isDefault;
+			let isDefault: boolean | string = Types.isUndefined(external.isDefault) ? false : external.isDefault;
 
 			return { _id: group, isDefault };
 		}
@@ -1260,7 +1260,7 @@ export namespace GroupKind {
 		}
 		return {
 			kind: group._id,
-			isDefault: group.isDefault
+			isDefault: group.isDefault,
 		};
 	}
 }