diff --git a/CMakeLists.txt b/CMakeLists.txt
index a007d4e..51c30ed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,8 @@ set_target_properties(
     POSITION_INDEPENDENT_CODE TRUE
 )
 
+target_compile_options(libikarus PRIVATE "-fvisibility=hidden" "-fvisibility-inlines-hidden")
+
 target_include_directories(
     libikarus
     PUBLIC