diff --git a/include/restc-cpp/restc-cpp.h b/include/restc-cpp/restc-cpp.h
index 12fc247..ef76416 100644
--- a/include/restc-cpp/restc-cpp.h
+++ b/include/restc-cpp/restc-cpp.h
@@ -52,6 +52,14 @@
 #   define RESTC_CPP_IO_BUFFER_SIZE (1024 * 16)
 #endif
 
+#if BOOST_VERSION >= 108100
+// They changed the function signature. In boost 1.86 it broke the build.
+#define RESTC_CPP_SPAWN_TRAILER \
+    , boost::asio::detached
+#else
+#define RESTC_CPP_SPAWN_TRAILER
+#endif
+
 namespace restc_cpp {
 
 class RestClient;
@@ -380,7 +388,7 @@ class RestClient {
                 prom->set_exception(std::current_exception());
             }
             done_handler.reset();
-        });
+        } RESTC_CPP_SPAWN_TRAILER);
 
         return move(future);
     }
diff --git a/src/RestClientImpl.cpp b/src/RestClientImpl.cpp
index 6b20efd..f8cd8e5 100644
--- a/src/RestClientImpl.cpp
+++ b/src/RestClientImpl.cpp
@@ -276,7 +276,7 @@ class  RestClientImpl final : public RestClient {
     void Process(const prc_fn_t& fn) override {
         boost::asio::spawn(*io_service_,
                            bind(&RestClientImpl::ProcessInWorker, this,
-                                placeholders::_1, fn, nullptr));
+                                placeholders::_1, fn, nullptr) RESTC_CPP_SPAWN_TRAILER);
     }
 
     future< void > ProcessWithPromise(const prc_fn_t& fn) override {
@@ -285,7 +285,7 @@ class  RestClientImpl final : public RestClient {
 
         boost::asio::spawn(*io_service_,
                            bind(&RestClientImpl::ProcessInWorker, this,
-                                placeholders::_1, fn, promise));
+                                placeholders::_1, fn, promise) RESTC_CPP_SPAWN_TRAILER);
 
         return future;
     }