diff --git a/setup_osx.py b/setup_osx.py
index afe737fb..c0266675 100644
--- a/setup_osx.py
+++ b/setup_osx.py
@@ -56,7 +56,7 @@ PLIST = dict(
     CFBundleExecutable = PACKAGE,
     CFBundleDisplayName = PACKAGE,
     CFBundleGetInfoString = GETINFO_STRING,
-    CFBundleIdentifier = 'org.pysol.PySol',
+    CFBundleIdentifier = 'net.sourceforge.pysolfc',
     CFBundleName = PACKAGE,
     CFBundleVersion = '%s' % VERSION,
     CFBundleShortVersionString = '%s' % VERSION,