diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1ef41df0eb..65fd0edf76 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,8 @@ SET( TOMAHAWK_VERSION_PATCH 99 )
 
 #SET( TOMAHAWK_VERSION_RC 0 )
 
+# enforce proper symbol exporting on all platforms
+add_definitions( "-fvisibility=hidden" )
 
 # build options
 option(BUILD_GUI "Build Tomahawk with GUI" ON)