diff --git a/mail/app/macbuild/Contents/Info.plist b/mail/app/macbuild/Contents/Info.plist
index 348be422b7ba..ac364b5f1bd0 100644
--- a/mail/app/macbuild/Contents/Info.plist
+++ b/mail/app/macbuild/Contents/Info.plist
@@ -21,7 +21,7 @@
CFBundleShortVersionString
0.5a
CFBundleSignature
- MOZZ
+ MOZM
CFBundleVersion
0.5a
NSAppleScriptEnabled