diff --git a/scheduled_host_transition.hpp b/scheduled_host_transition.hpp
index 2fe3e36..1966f63 100644
--- a/scheduled_host_transition.hpp
+++ b/scheduled_host_transition.hpp
@@ -107,11 +107,11 @@
     /** @brief The deleter of sd_event_source */
     std::function<void(sd_event_source*)> sdEventSourceDeleter =
         [](sd_event_source* p) {
-        if (p != nullptr)
-        {
-            sd_event_source_unref(p);
-        }
-    };
+            if (p != nullptr)
+            {
+                sd_event_source_unref(p);
+            }
+        };
 
     using SdEventSource =
         std::unique_ptr<sd_event_source, decltype(sdEventSourceDeleter)>;