diff --git a/pkgs/applications/networking/instant-messengers/viber/default.nix b/pkgs/applications/networking/instant-messengers/viber/default.nix
index f16ee8bd5cc..9c25c6eaad2 100644
--- a/pkgs/applications/networking/instant-messengers/viber/default.nix
+++ b/pkgs/applications/networking/instant-messengers/viber/default.nix
@@ -80,7 +80,7 @@ stdenv.mkDerivation rec {
     wrapProgram $out/opt/viber/Viber \
       --set QT_PLUGIN_PATH "$out/opt/viber/plugins" \
       --set QT_XKB_CONFIG_ROOT "${xorg.xkeyboardconfig}/share/X11/xkb" \
-      --set QTCOMPOSE "${xorg.libX11}/share/X11/locale"
+      --set QTCOMPOSE "${xorg.libX11.out}/share/X11/locale"
     ln -s $out/opt/viber/Viber $out/bin/viber
 
     mv $out/usr/share $out/share