diff --git a/gio/inotify/meson.build b/gio/inotify/meson.build
index a1d542a24..0221c9703 100644
--- a/gio/inotify/meson.build
+++ b/gio/inotify/meson.build
@@ -11,5 +11,6 @@ inotify_lib = static_library('inotify',
   sources : inotify_sources,
   include_directories : [configinc, glibinc, gmoduleinc],
   dependencies : [gioenumtypes_dep, libglib_dep, libgobject_dep],
+  gnu_symbol_visibility : 'hidden',
   pic : true,
   c_args : [gio_c_args, gio_c_args_internal])
diff --git a/gio/kqueue/meson.build b/gio/kqueue/meson.build
index c800ce3c3..04e48aad3 100644
--- a/gio/kqueue/meson.build
+++ b/gio/kqueue/meson.build
@@ -9,5 +9,6 @@ kqueue_lib = static_library('kqueue',
   sources : kqueue_sources,
   include_directories : [configinc, glibinc, gmoduleinc],
   dependencies : [gioenumtypes_dep],
+  gnu_symbol_visibility : 'hidden',
   pic : true,
   c_args : [gio_c_args, gio_c_args_internal])
diff --git a/gio/win32/meson.build b/gio/win32/meson.build
index c44bb8195..0a896aca0 100644
--- a/gio/win32/meson.build
+++ b/gio/win32/meson.build
@@ -11,5 +11,6 @@ giowin32_lib = static_library('giowin32',
   sources : [giowin32_sources],
   include_directories : [configinc, glibinc, gioinc, gmoduleinc],
   dependencies : [libintl, gioenumtypes_dep],
+  gnu_symbol_visibility : 'hidden',
   pic : true,
   c_args : [gio_c_args, gio_c_args_internal])