4 files changed, 13 insertions, 0 deletions
diff --git a/src/serialization/binary_utils.h b/src/serialization/binary_utils.h
index d06e8a22a..00bb1741d 100644
--- a/src/serialization/binary_utils.h
+++ b/src/serialization/binary_utils.h
@@ -2,6 +2,8 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#pragma once
+
 #include <sstream>
 #include "binary_archive.h"
 
diff --git a/src/serialization/crypto.h b/src/serialization/crypto.h
index b7763ffeb..6e683e629 100644
--- a/src/serialization/crypto.h
+++ b/src/serialization/crypto.h
@@ -2,6 +2,8 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#pragma once
+
 #include <vector>
 
 #include "serialization.h"
diff --git a/src/serialization/json_utils.h b/src/serialization/json_utils.h
index 35bcc0335..24f5c11a8 100644
--- a/src/serialization/json_utils.h
+++ b/src/serialization/json_utils.h
@@ -2,6 +2,8 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#pragma once
+
 #include <sstream>
 #include "json_archive.h"
 
diff --git a/src/serialization/vector.h b/src/serialization/vector.h
index 9a0c0ee56..d07472352 100644
--- a/src/serialization/vector.h
+++ b/src/serialization/vector.h
@@ -17,6 +17,13 @@ namespace serialization
     }
 
     template <typename Archive>
+    bool serialize_vector_element(Archive& ar, uint32_t& e)
+    {
+      ar.serialize_varint(e);
+      return true;
+    }
+
+    template <typename Archive>
     bool serialize_vector_element(Archive& ar, uint64_t& e)
     {
       ar.serialize_varint(e);