diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc9786257..6befb16ed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,9 @@ if(VERBOSE)
   set(FETCHCONTENT_QUIET FALSE CACHE STRING "Verbose FetchContent()")
 endif()
 
+#c++20 removed std::result_of but boost 1.75 is still using it.
+add_definitions(-DBOOST_ASIO_HAS_STD_INVOKE_RESULT=1)
+
 add_library(clio)
 target_compile_features(clio PUBLIC cxx_std_20)
 target_include_directories(clio PUBLIC src)
diff --git a/src/backend/BackendInterface.h b/src/backend/BackendInterface.h
index 2634650a7..e70d33079 100644
--- a/src/backend/BackendInterface.h
+++ b/src/backend/BackendInterface.h
@@ -111,7 +111,7 @@ synchronous(F&& f)
      * R is the currently executing coroutine that is about to get passed.
      * If corountine types do not match, the current one's type is stored.
      */
-    using R = typename std::result_of<F(boost::asio::yield_context&)>::type;
+    using R = typename boost::result_of<F(boost::asio::yield_context&)>::type;
     if constexpr (!std::is_same<R, void>::value)
     {
         /**
diff --git a/src/main/main.cpp b/src/main/main.cpp
index 859ff2092..db35b8dd5 100644
--- a/src/main/main.cpp
+++ b/src/main/main.cpp
@@ -224,7 +224,7 @@ doMigration(
         {
             std::vector<NFTsData> toWrite = getNFTDataFromObj(
                 ledgerRange->minSequence,
-                ripple::to_string(object.key),
+                std::string(object.key.begin(), object.key.end()),
                 std::string(object.blob.begin(), object.blob.end()));
             doNFTWrite(toWrite, backend, "OBJ");
         }
diff --git a/src/rpc/RPC.cpp b/src/rpc/RPC.cpp
index 35ae1e731..32e13a986 100644
--- a/src/rpc/RPC.cpp
+++ b/src/rpc/RPC.cpp
@@ -178,7 +178,7 @@ public:
     {
         for (auto const& handler : handlers)
         {
-            handlerMap_[handler.method] = move(handler);
+            handlerMap_[handler.method] = std::move(handler);
         }
     }