bin/chdt: Improve current desktop number validation

1 files changed, 1 insertions, 1 deletions

diff --git a/bin/chdt b/bin/chdt
index 3bd503a..a6e1e5d 100755
--- a/bin/chdt
+++ b/bin/chdt
@@ -35,7 +35,7 @@ get_desktop()
 
 	dt=$(wmctrl -d | sed -n '/^[0-9][0-9]*  *\* /{ s/  *\* .*$//; p; q; };')
 	case "${dt}" in
-		*[!0-9]*)
+		*[!0-9]* | '')
 			err 'Failed to get current desktop number'
 			return 1
 			;;