--- a/physfs_internal.h	Mon Jul 09 23:33:37 2001 +0000
+++ b/physfs_internal.h	Sun Jul 15 09:27:41 2001 +0000
@@ -248,6 +248,7 @@
 #define ERR_NO_SUCH_FILE         "No such file"
 #define ERR_PAST_EOF             "Past end of file"
 #define ERR_ARC_IS_READ_ONLY     "Archive is read-only"
+#define ERR_IO_ERROR             "I/O error"
 
 /*
  * Call this to set the message returned by PHYSFS_getLastError().
@@ -299,7 +300,7 @@
 /*------------                                              ----------------*/
 /*------------  You MUST implement the following functions  ----------------*/
 /*------------        if porting to a new platform.         ----------------*/
-/*------------         (see unix.c for an example)          ----------------*/
+/*------------     (see platform/unix.c for an example)     ----------------*/
 /*------------                                              ----------------*/
 /*--------------------------------------------------------------------------*/
 /*--------------------------------------------------------------------------*/