diff --git a/src/vs/workbench/api/node/extHostSCM.ts b/src/vs/workbench/api/node/extHostSCM.ts
index b2f88f4e814..eb3ce7cf67f 100644
--- a/src/vs/workbench/api/node/extHostSCM.ts
+++ b/src/vs/workbench/api/node/extHostSCM.ts
@@ -125,7 +125,7 @@ class ExtHostSourceControlResourceGroup implements vscode.SourceControlResourceG
 				icons.push(darkIconPath);
 			}
 
-			const tooltip = r.decorations.tooltip;
+			const tooltip = (r.decorations && r.decorations.tooltip) || '';
 			const strikeThrough = r.decorations && !!r.decorations.strikeThrough;
 			const faded = r.decorations && !!r.decorations.faded;