diff --git a/apps/api/src/routes/api/v1/applications/handlers.ts b/apps/api/src/routes/api/v1/applications/handlers.ts
index 1eadc625e..c83504f94 100644
--- a/apps/api/src/routes/api/v1/applications/handlers.ts
+++ b/apps/api/src/routes/api/v1/applications/handlers.ts
@@ -451,7 +451,7 @@ export async function deployApplication(request: FastifyRequest<DeployApplicatio
                     applicationId: id,
                     sourceBranch: branch,
                     branch: application.branch,
-                    pullmergeRequestId: pullmergeRequestId.toString(),
+                    pullmergeRequestId: pullmergeRequestId?.toString(),
                     forceRebuild,
                     destinationDockerId: application.destinationDocker?.id,
                     gitSourceId: application.gitSource?.id,
@@ -937,4 +937,4 @@ export async function cancelDeployment(request: FastifyRequest<CancelDeployment>
     } catch ({ status, message }) {
         return errorHandler({ status, message })
     }
-}
\ No newline at end of file
+}