diff --git a/power-supply/record_manager.hpp b/power-supply/record_manager.hpp
index 63e4dd8..88baa31 100644
--- a/power-supply/record_manager.hpp
+++ b/power-supply/record_manager.hpp
@@ -70,7 +70,8 @@
      * @param[in] maxRec - the maximum number of history
      *                     records to keep at a time
      */
-    RecordManager(size_t maxRec) : RecordManager(maxRec, LAST_SEQUENCE_ID)
+    explicit RecordManager(size_t maxRec) :
+        RecordManager(maxRec, LAST_SEQUENCE_ID)
     {}
 
     /**