diff --git a/howto/quintex.md b/howto/quintex.md
index 6ed42d8cafa7b4768f0535813204dda7b05c784e..c08fbf624d5125fb40c0884c73c6f9c1f4de340e 100644
--- a/howto/quintex.md
+++ b/howto/quintex.md
@@ -97,7 +97,7 @@ its signature:
 
     wget https://download.grml.org/grml64-small_2022.11.iso &&
     wget https://download.grml.org/grml64-small_2022.11.iso.asc &&
-    gpg --verify grml64-small_2022.11.iso.asc
+    gpg --verify --keyring /usr/share/keyrings/debian-keyring.gpg grml64-small_2022.11.iso.asc
 
 Extract the `vmlinuz` and `initrd.img` boot files, and modify the
 latter as follows: