diff --git a/templates/override.conf.j2 b/templates/override.conf.j2
index adab53c..17b0abf 100644
--- a/templates/override.conf.j2
+++ b/templates/override.conf.j2
@@ -1,3 +1,4 @@
 # {{ ansible_managed }}
 [Service]
 ExecStartPre=
+{% if docker_exec_start is defined %}ExecStart={{ docker_exec_start }}{% endif %}