diff --git a/CMakeLists.txt b/CMakeLists.txt
index e1a4a41e..d80119e2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,6 +35,7 @@ endif ()
 
 
 set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 
 if (CMAKE_SYSTEM_NAME MATCHES "CYGWIN" OR CMAKE_SYSTEM_NAME MATCHES "MSYS" OR CMAKE_SYSTEM_NAME MATCHES "MINGW")
     set(CMAKE_CXX_EXTENSIONS ON)