fix umount usage message
diff --git a/include/usage.h b/include/usage.h
index 5073c9b..a98d52e 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3357,7 +3357,8 @@
#define umount_full_usage \
"Unmount file systems" \
"\n\nOptions:\n" \
- "\n -a Unmount all file systems" USE_FEATURE_MTAB_SUPPORT(" in /etc/mtab") \
+ USE_FEATURE_UMOUNT_ALL( \
+ "\n -a Unmount all file systems" USE_FEATURE_MTAB_SUPPORT(" in /etc/mtab")) \
USE_FEATURE_MTAB_SUPPORT( \
"\n -n Don't erase /etc/mtab entries") \
"\n -r Try to remount devices as read-only if mount is busy" \