diff --git a/extensions/typescript/src/features/workspaceSymbolProvider.ts b/extensions/typescript/src/features/workspaceSymbolProvider.ts
index 0503fdfcdb13b043736b0a902e38f5dfc4f0eb3b..ba7f8684d586dfc8875419bb60454acc19ae8924 100644
--- a/extensions/typescript/src/features/workspaceSymbolProvider.ts
+++ b/extensions/typescript/src/features/workspaceSymbolProvider.ts
@@ -78,7 +78,7 @@ export default class TypeScriptWorkspaceSymbolProvider implements WorkspaceSymbo
 					if (item.kind === 'method' || item.kind === 'function') {
 						label += '()';
 					}
-					result.push(new SymbolInformation(label, _kindMapping[item.kind], '' + item.containerName,
+					result.push(new SymbolInformation(label, _kindMapping[item.kind], item.containerName ? item.containerName : '',
 						new Location(this.client.asUrl(item.file), range)));
 				}
 				return result;