diff --git a/src/vs/workbench/api/common/extHostConfiguration.ts b/src/vs/workbench/api/common/extHostConfiguration.ts
index b4aad76159e..6042075bc00 100644
--- a/src/vs/workbench/api/common/extHostConfiguration.ts
+++ b/src/vs/workbench/api/common/extHostConfiguration.ts
@@ -85,6 +85,9 @@ function scopeToOverrides(scope: vscode.ConfigurationScope | undefined | null):
 	if (isWorkspaceFolder(scope)) {
 		return { resource: scope.uri };
 	}
+	if (scope === null) {
+		return { resource: null };
+	}
 	return undefined;
 }