diff --git a/bmc_epoch.hpp b/bmc_epoch.hpp
index 40b86f1..898029f 100644
--- a/bmc_epoch.hpp
+++ b/bmc_epoch.hpp
@@ -101,11 +101,11 @@
     /** @brief The deleter of sd_event_source */
     std::function<void(sd_event_source*)> sdEventSourceDeleter =
         [](sd_event_source* p) {
-            if (p)
-            {
-                sd_event_source_unref(p);
-            }
-        };
+        if (p)
+        {
+            sd_event_source_unref(p);
+        }
+    };
     using SdEventSource =
         std::unique_ptr<sd_event_source, decltype(sdEventSourceDeleter)>;