diff --git a/include/rcp.h b/include/rcp.h
index ca010bb..51d28ec 100644
--- a/include/rcp.h
+++ b/include/rcp.h
@@ -122,12 +122,7 @@ public:
         return *ptr;
     }
 
-    bool operator!() const
-    {
-        return !ptr;
-    }
-
-    operator bool() const
+    explicit operator bool() const
     {
         return ptr != nullptr;
     }