diff --git a/isdnutils/debian/capiutils.init b/isdnutils/debian/capiutil
--- a/isdnutils/debian/capiutils.init
+++ b/isdnutils/debian/capiutils.init
@@ -36,6 +36,10 @@ mountcapifs()
   if [ -e /dev/.devfsd ]; then
     modprobe capifs
   fi
+  if ! grep -q 'capifs' /proc/filesystems; then
+    # recent kernels no longer support capifs, which is ok for us
+    return
+  fi
   if grep -q '^capifs /dev/capi ' /proc/mounts; then
     return
   fi