diff --git a/toolkit/fonts/moz.build b/toolkit/fonts/moz.build
index a2a37879d9..bfdff9e075 100644
--- a/toolkit/fonts/moz.build
+++ b/toolkit/fonts/moz.build
@@ -3,5 +3,5 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-if CONFIG['OS_ARCH'] in ('WINNT', 'Linux'):
+if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('windows', 'gtk2', 'gtk3'):
     FINAL_TARGET_FILES.fonts += ['TwemojiMozilla.ttf']