diff --git a/extras/ide-devfs.sh b/extras/ide-devfs.sh
index 8648f6c0c0..1cf6f9c9e4 100644
--- a/extras/ide-devfs.sh
+++ b/extras/ide-devfs.sh
@@ -18,7 +18,7 @@ get_dev_number() {
 	local x=
 	local num=0
 	local MEDIA=
-	local DRIVE="${1%[0-9]*}"
+	local DRIVE="${1%%[0-9]*}"
 
 	for x in /proc/ide/*/media; do
 		if [ -e "${x}" ]; then