diff --git a/srcpkgs/firefox-esr/files/firefox-wayland b/srcpkgs/firefox-esr/files/firefox-wayland
index 495f901320c..e07fd87b235 100644
--- a/srcpkgs/firefox-esr/files/firefox-wayland
+++ b/srcpkgs/firefox-esr/files/firefox-wayland
@@ -1,2 +1,2 @@
 #!/bin/sh
-exec env MOZ_ENABLE_WAYLAND= /usr/lib/firefox/firefox "$@"
+exec env MOZ_ENABLE_WAYLAND=1 /usr/lib/firefox/firefox "$@"