diff --git a/rules/packages/40-isdn.rules b/rules/packages/40-isdn.rules
index f2bc34e5c80..8a4686f0b70 100644
--- a/rules/packages/40-isdn.rules
+++ b/rules/packages/40-isdn.rules
@@ -1,5 +1,4 @@
 # do not edit this file, it will be overwritten on update
 
-SUBSYSTEM=="capi",	GROUP="uucp"
-KERNEL=="capi",		NAME="capi20", SYMLINK+="isdn/capi20"
-KERNEL=="capi*",	NAME="capi/%n"
+SUBSYSTEM=="capi", KERNEL=="capi", NAME="capi20", SYMLINK+="isdn/capi20", GROUP="uucp"
+SUBSYSTEM=="tty", KERNEL=="capi[0-9]*", NAME="capi/%n"