diff --git a/src/meson.build b/src/meson.build
index bd63a4d..31f789f 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -12,6 +12,7 @@ lib_util = static_library('util',
     src_libutil,
     include_directories: [inc_builddir],
     dependencies: [dep_math, dep_epoll],
+    gnu_symbol_visibility: 'hidden',
 )
 
 dep_libutil = declare_dependency(link_with: lib_util)