diff --git a/occ_pass_through.hpp b/occ_pass_through.hpp
index 185db79..a1e1e91 100644
--- a/occ_pass_through.hpp
+++ b/occ_pass_through.hpp
@@ -39,7 +39,7 @@
     /** @brief Ctor to put pass-through d-bus object on the bus
      *  @param[in] path - Path to attach at
      */
-    PassThrough(const char* path);
+    explicit PassThrough(const char* path);
 
     /** @brief Pass through command to OCC from dbus
      *  @param[in] command - command to pass-through