diff --git a/mozilla/raptor.mak b/mozilla/raptor.mak
index 97d4cc12002..ad06cbef1ba 100644
--- a/mozilla/raptor.mak
+++ b/mozilla/raptor.mak
@@ -317,7 +317,7 @@ doc_raptor:
 
 # Build tarball
 
-DATE_CMD=d:\usr\local\bin\date
+DATE_CMD=unix_date
 !if [$(DATE_CMD) +%Y%m%d > today.inc]
 !endif
 DATE=\