diff --git a/degesch.c b/degesch.c
index 4cba07c..4ae824d 100644
--- a/degesch.c
+++ b/degesch.c
@@ -7747,6 +7747,9 @@ lua_timer_hook_dispatch (void *user_data)
 			plugin->super.name, "timer hook", e->message);
 		error_free (e);
 	}
+
+	// There's no need to keep the hook around once the timer is dispatched
+	lua_cache_invalidate (L, hook);
 }
 
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