diff --git a/dist.sh b/dist.sh
index e2bdac0..5f325a0 100755
--- a/dist.sh
+++ b/dist.sh
@@ -3,7 +3,14 @@
 rm -f "romXx_dist-*.zip"
 ROM4X="rom4x/iic_rom4x.bin"
 ROM5X="rom5x/iic+_rom5x.bin"
-FNAME="romXx_dist-`date --rfc-3339=date`.zip"
+case `uname -s` in
+Linux)
+	FNAME="romXx_dist-`date --rfc-3339=date`.zip"
+	;;
+*)
+	FNAME="romXx_dist-`date '+%Y-%M-%d'`.zip"
+	;;
+esac
 [ -f "${ROM4X}" ] && zip "${FNAME}" "${ROM4X}"
 [ -f "${ROM5X}" ] && zip "${FNAME}" "${ROM5X}"