diff --git a/meson_options.txt b/meson_options.txt
index 83ff501812..299e33d91d 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,5 +1,9 @@
 # GDK backends
 
+# Windowing system backends
+# Note: The options change the abi (what backend api is available) without
+# changing the soname, so think twice before deviating from the default values.
+
 option('x11-backend',
        type: 'boolean',
        value: true,