diff --git a/clientgui/AsyncRPC.cpp b/clientgui/AsyncRPC.cpp
index 4d365e24c1..1f8831638f 100644
--- a/clientgui/AsyncRPC.cpp
+++ b/clientgui/AsyncRPC.cpp
@@ -380,7 +380,8 @@ int RPCThread::ProcessRPCRequest() {
         retval = (m_pDoc->rpcClient).project_attach(
             (const char*)(current_request->arg1), 
             (const char*)(current_request->arg2), 
-            (const char*)(current_request->arg3)
+            (const char*)(current_request->arg3),
+            (const char*)(current_request->arg4)
         );
         break;
     case RPC_PROJECT_ATTACH_FROM_FILE:
diff --git a/clientgui/AsyncRPC.h b/clientgui/AsyncRPC.h
index f441716d8e..16bf842d1d 100644
--- a/clientgui/AsyncRPC.h
+++ b/clientgui/AsyncRPC.h
@@ -304,8 +304,12 @@ public:
     int create_account_poll(ACCOUNT_OUT& arg1)
             { return RPC_Wait(RPC_CREATE_ACCOUNT_POLL, (void*)&arg1); }
     int project_attach(
-        const char* url, const char* auth, const char* project_name 
-    )       { return RPC_Wait(RPC_PROJECT_ATTACH, (void*)url, (void*)auth, (void*)project_name); }
+        const char* url, const char* auth, const char* project_name, const char* email_addr
+    ) {
+        return RPC_Wait(
+            RPC_PROJECT_ATTACH, (void*)url, (void*)auth, (void*)project_name, (void*)email_addr
+        );
+    }
     int project_attach_from_file()
             { return RPC_Wait(RPC_PROJECT_ATTACH_FROM_FILE); }
     int project_attach_poll(PROJECT_ATTACH_REPLY& arg1)