diff --git a/Running-programs-natively-under-Wayland.md b/Running-programs-natively-under-Wayland.md
index abefe98..7f116ab 100644
--- a/Running-programs-natively-under-Wayland.md
+++ b/Running-programs-natively-under-Wayland.md
@@ -27,6 +27,12 @@ To use your monitor's DPI instead of the default of 96 DPI:
 QT_WAYLAND_FORCE_DPI=physical
 ```
 
+Older versions of Qt always show window decorations. To hide them:
+
+```
+QT_WAYLAND_DISABLE_WINDOWDECORATION=1
+```
+
 ## Elementary/EFL
 
 ```