diff --git a/src/ozw/ozw.hpp b/src/ozw/ozw.hpp
index e8ad57bf..78d9188b 100644
--- a/src/ozw/ozw.hpp
+++ b/src/ozw/ozw.hpp
@@ -576,8 +576,8 @@ namespace upm {
 
   private:
     // prevent copying and assignment
-    OZW(OZW const &) {};
-    OZW& operator=(OZW const&) {};
+    OZW(OZW const &) = delete;
+    OZW& operator=(OZW const&) = delete;
 
     // our class instance
     static OZW* m_instance;
diff --git a/src/ozw/zwNode.cxx b/src/ozw/zwNode.cxx
index 2ce1208a..0959eded 100644
--- a/src/ozw/zwNode.cxx
+++ b/src/ozw/zwNode.cxx
@@ -24,6 +24,8 @@
 
 #include <stdint.h>
 #include <string>
+#include <cinttypes>
+
 #include "zwNode.hpp"
 
 #include "Node.h"
@@ -185,7 +187,7 @@ void zwNode::dumpNode(bool all)
                   valueUnits.c_str(),
                   perms.c_str());
 
-          fprintf(stderr, "\t\t VID: %016x\n",
+          fprintf(stderr, "\t\t VID: %016" PRIx64 "\n",
                   vid.GetId());
         }
     }