diff --git a/src/cpp/CMakeLists.txt b/src/cpp/CMakeLists.txt
index e0be0a759a3..1d3d9f8232f 100644
--- a/src/cpp/CMakeLists.txt
+++ b/src/cpp/CMakeLists.txt
@@ -452,6 +452,7 @@ target_compile_definitions(${PROJECT_NAME}
     BOOST_ASIO_STANDALONE
     ASIO_STANDALONE
     ASIO_DISABLE_VISIBILITY
+    EPROSIMA_USER_DLL_EXPORT
     SQLITE_WIN32_GETVERSIONEX=0
     $<$<AND:$<NOT:$<BOOL:${WIN32}>>,$<STREQUAL:"${CMAKE_BUILD_TYPE}","Debug">>:__DEBUG>
     $<$<BOOL:${INTERNAL_DEBUG}>:__INTERNALDEBUG> # Internal debug activated.