diff --git a/lib/manager/argocd/extract.ts b/lib/manager/argocd/extract.ts
index 9561f7c5061b5a6450de38252f9c43bb42c15e77..b4b0839fc2260fef066120a5b2ac6e3ed8b4942f 100644
--- a/lib/manager/argocd/extract.ts
+++ b/lib/manager/argocd/extract.ts
@@ -9,7 +9,7 @@ import { fileTestRegex } from './util';
 function createDependency(
   definition: ApplicationDefinition
 ): PackageDependency {
-  const source = definition.spec?.source;
+  const source = definition?.spec?.source;
 
   if (
     !source ||