diff --git a/meson.build b/meson.build
index 11541e21..a6f8974e 100644
--- a/meson.build
+++ b/meson.build
@@ -642,7 +642,7 @@ if get_option('docs')
       '@OUTPUT@',
     ],
     install: true,
-    install_dir: join_paths(get_option('datadir'), 'doc', 'i3'),
+    install_dir: docdir,
   )
 
   custom_target(
@@ -655,7 +655,7 @@ if get_option('docs')
       '@OUTPUT@',
     ],
     install: true,
-    install_dir: join_paths(get_option('datadir'), 'doc', 'i3'),
+    install_dir: docdir,
   )
 endif