diff --git a/tools/setup_sdcard.sh b/tools/setup_sdcard.sh
index 2b3977db3f45ccd24c1df00ccf064d170fa4a697..daa0814a3c587b03f6750c3460d50c99546601ef 100755
--- a/tools/setup_sdcard.sh
+++ b/tools/setup_sdcard.sh
@@ -1722,7 +1722,7 @@ while [ ! -z "$1" ] ; do
 		check_root
 		check_mmc
 		;;
-	--img|--img-[1248]gb)
+	--img|--img-[12468]gb)
 		checkparm $2
 		name=${2:-image}
 		gsize=$(echo "$1" | sed -ne 's/^--img-\([[:digit:]]\+\)gb$/\1/p')