diff --git a/build-aux/meson/postinstall.py b/build-aux/meson/postinstall.py
index 213a4a61..851743ad 100755
--- a/build-aux/meson/postinstall.py
+++ b/build-aux/meson/postinstall.py
@@ -10,7 +10,7 @@ destdir = environ.get('DESTDIR', '')
 # Package managers set this so we don't need to run
 if not destdir:
     print('Updating icon cache...')
-    call(['gtk-update-icon-cache', '-qtf', path.join(sharedir, 'icons', 'hicolor')])
+    call(['gtk4-update-icon-cache', '-qtf', path.join(sharedir, 'icons', 'hicolor')])
 
     print('Updating mime database...')
     call(['update-mime-database', path.join(sharedir, 'mime')])