diff --git a/libraries/wallet/include/graphene/wallet/wallet.hpp b/libraries/wallet/include/graphene/wallet/wallet.hpp
index 80738fc5..f8f90978 100644
--- a/libraries/wallet/include/graphene/wallet/wallet.hpp
+++ b/libraries/wallet/include/graphene/wallet/wallet.hpp
@@ -203,6 +203,16 @@ struct exported_keys
     vector<exported_account_keys> account_keys;
 };
 
+struct approval_delta
+{
+   vector<string> active_approvals_to_add;
+   vector<string> active_approvals_to_remove;
+   vector<string> owner_approvals_to_add;
+   vector<string> owner_approvals_to_remove;
+   vector<string> key_approvals_to_add;
+   vector<string> key_approvals_to_remove;
+};
+
 namespace detail {
 class wallet_api_impl;
 }
@@ -1211,11 +1221,25 @@ class wallet_api
          const variant_object& changed_values,
          bool broadcast = false);
 
+      /** Approve or disapprove a proposal.
+       *
+       * @param fee_paying_account The account paying the fee for the op.
+       * @param proposal_id The proposal to modify.
+       * @param delta Members contain approvals to create or remove.  In JSON you can leave empty members undefined.
+       * @param broadcast true if you wish to broadcast the transaction
+       * @return the signed version of the transaction
+       */
+      signed_transaction approve_proposal(
+         const string& fee_paying_account,
+         const string& proposal_id,
+         const approval_delta& delta,
+         bool broadcast /* = false */
+         );
+
       void dbg_make_uia(string creator, string symbol);
       void dbg_make_mia(string creator, string symbol);
       void flood_network(string prefix, uint32_t number_of_transactions);
 
-
       /**
        *  Used to transfer from one set of blinded balances to another
        */
@@ -1269,6 +1293,15 @@ FC_REFLECT( graphene::wallet::exported_keys, (password_checksum)(account_keys) )
 FC_REFLECT( graphene::wallet::blind_receipt,
             (date)(from_key)(from_label)(to_key)(to_label)(amount)(memo)(control_authority)(data)(used)(conf) )
 
+FC_REFLECT( graphene::wallet::approval_delta,
+   (active_approvals_to_add)
+   (active_approvals_to_remove)
+   (owner_approvals_to_add)
+   (owner_approvals_to_remove)
+   (key_approvals_to_add)
+   (key_approvals_to_remove)
+)
+
 FC_API( graphene::wallet::wallet_api,
         (help)
         (gethelp)
@@ -1344,6 +1377,7 @@ FC_API( graphene::wallet::wallet_api,
         (get_prototype_operation)
         (propose_parameter_change)
         (propose_fee_change)
+        (approve_proposal)
         (dbg_make_uia)
         (dbg_make_mia)
         (flood_network)
@@ -1360,4 +1394,3 @@ FC_API( graphene::wallet::wallet_api,
         (blind_history)
         (receive_blind_transfer)
       )
-
diff --git a/libraries/wallet/wallet.cpp b/libraries/wallet/wallet.cpp
index b632d7c3..a7567c57 100644
--- a/libraries/wallet/wallet.cpp
+++ b/libraries/wallet/wallet.cpp
@@ -1879,6 +1879,39 @@ public:
       FC_ASSERT( false, "not implemented" );
    }
 
+   signed_transaction approve_proposal(
+      const string& fee_paying_account,
+      const string& proposal_id,
+      const approval_delta& delta,
+      bool broadcast = false)
+   {
+      proposal_update_operation update_op;
+
+      update_op.fee_paying_account = get_account(fee_paying_account).id;
+      update_op.proposal = fc::variant(proposal_id).as<proposal_id_type>();
+      // make sure the proposal exists
+      get_object( update_op.proposal );
+
+      for( const std::string& name : delta.active_approvals_to_add )
+         update_op.active_approvals_to_add.insert( get_account( name ).id );
+      for( const std::string& name : delta.active_approvals_to_remove )
+         update_op.active_approvals_to_remove.insert( get_account( name ).id );
+      for( const std::string& name : delta.owner_approvals_to_add )
+         update_op.owner_approvals_to_add.insert( get_account( name ).id );
+      for( const std::string& name : delta.owner_approvals_to_remove )
+         update_op.owner_approvals_to_remove.insert( get_account( name ).id );
+      for( const std::string& k : delta.key_approvals_to_add )
+         update_op.key_approvals_to_add.insert( public_key_type( k ) );
+      for( const std::string& k : delta.key_approvals_to_remove )
+         update_op.key_approvals_to_remove.insert( public_key_type( k ) );
+
+      signed_transaction tx;
+      tx.operations.push_back(update_op);
+      set_operation_fees(tx, get_global_properties().parameters.current_fees);
+      tx.validate();
+      return sign_transaction(tx, broadcast);
+   }
+
    void dbg_make_uia(string creator, string symbol)
    {
       asset_options opts;
@@ -2615,6 +2648,16 @@ signed_transaction wallet_api::propose_fee_change(
    return my->propose_fee_change( proposing_account, changed_values, broadcast );
 }
 
+signed_transaction wallet_api::approve_proposal(
+   const string& fee_paying_account,
+   const string& proposal_id,
+   const approval_delta& delta,
+   bool broadcast /* = false */
+   )
+{
+   return my->approve_proposal( fee_paying_account, proposal_id, delta, broadcast );
+}
+
 global_property_object wallet_api::get_global_properties() const
 {
    return my->get_global_properties();