diff --git a/CMakeLists.txt b/CMakeLists.txt
index df7e7a3..4879802 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,10 @@ project(influxdb-cxx
   LANGUAGES CXX
 )
 
+if (BUILD_SHARED_LIBS)
+  add_definitions(-DInfluxDB_EXPORTS)
+endif()
+
 message(STATUS "~~~ ${PROJECT_NAME} v${PROJECT_VERSION} ~~~")