diff --git a/stddiff b/stddiff
index 125e9aaa..770c1ce1 100755
--- a/stddiff
+++ b/stddiff
@@ -154,6 +154,9 @@ else
 	for i in drivers/isdn/divert/*.[ch] ; do
 		$DODIFF $i $KERNELDIR/$i
 	done
+	for i in drivers/isdn/hysdn/*.[ch] ; do
+		$DODIFF $i $KERNELDIR/$i
+	done
 	for i in drivers/isdn/icn/icn.[ch] ; do
 		$DODIFF $i $KERNELDIR/$i
 	done
@@ -197,6 +200,7 @@ else
 	done
 	for i in drivers/isdn/Makefile drivers/isdn/icn/Makefile \
 		drivers/isdn/divert/Makefile \
+		drivers/isdn/hysdn/Makefile \
 		drivers/isdn/isdnloop/Makefile \
 		drivers/isdn/sc/Makefile \
 		drivers/isdn/avmb1/Makefile \