diff --git a/libraries/wallet/include/graphene/wallet/wallet.hpp b/libraries/wallet/include/graphene/wallet/wallet.hpp
index 160a2e81..f39d4dcd 100644
--- a/libraries/wallet/include/graphene/wallet/wallet.hpp
+++ b/libraries/wallet/include/graphene/wallet/wallet.hpp
@@ -215,6 +215,7 @@ struct approval_delta
 
 struct signed_block_with_info : public signed_block
 {
+   signed_block_with_info();
    signed_block_with_info( const signed_block& block );
    signed_block_with_info( const signed_block_with_info& block ) = default;
 
@@ -224,6 +225,7 @@ struct signed_block_with_info : public signed_block
 
 struct vesting_balance_object_with_info : public vesting_balance_object
 {
+   vesting_balance_object_with_info();
    vesting_balance_object_with_info( const vesting_balance_object& vbo, fc::time_point_sec now );
    vesting_balance_object_with_info( const vesting_balance_object_with_info& vbo ) = default;
 
diff --git a/libraries/wallet/wallet.cpp b/libraries/wallet/wallet.cpp
index d55c5edb..81b1e820 100644
--- a/libraries/wallet/wallet.cpp
+++ b/libraries/wallet/wallet.cpp
@@ -3639,6 +3639,11 @@ vector<blind_receipt> wallet_api::blind_history( string key_or_account )
    return result;
 }
 
+// default ctor necessary for FC_REFLECT
+signed_block_with_info::signed_block_with_info()
+{
+}
+
 signed_block_with_info::signed_block_with_info( const signed_block& block )
    : signed_block( block )
 {
@@ -3646,6 +3651,11 @@ signed_block_with_info::signed_block_with_info( const signed_block& block )
    signing_key = signee();
 }
 
+vesting_balance_object_with_info::vesting_balance_object_with_info()
+   : vesting_balance_object()
+{
+}
+
 vesting_balance_object_with_info::vesting_balance_object_with_info( const vesting_balance_object& vbo, fc::time_point_sec now )
    : vesting_balance_object( vbo )
 {