diff --git a/FL/mac.H b/FL/mac.H
index d1a50db4b..6fcd18ce8 100644
--- a/FL/mac.H
+++ b/FL/mac.H
@@ -205,7 +205,7 @@ extern void fl_open_callback(void (*cb)(const char *));
  */
 extern void fl_mac_set_about( Fl_Callback *cb, void *user_data, int shortcut = 0);
 
-/** \brief The version number of the running Mac OS X (e.g., 0x1064 for 10.6.4)
+/** \brief The version number of the running Mac OS X (e.g., 100604 for 10.6.4)
  */
 extern int fl_mac_os_version;