diff -r 49f6101707b4 -r bd6ba9c8717c physfs_internal.h
--- a/physfs_internal.h	Sun Jul 08 10:58:10 2001 +0000
+++ b/physfs_internal.h	Sun Jul 08 13:57:28 2001 +0000
@@ -316,7 +316,7 @@
  *  calculateBaseDir() in physfs.c ...)
  *  Caller will free() the retval if it's not NULL.
  */
-char *__PHYSFS_platformCalcBaseDir(char *argv0);
+char *__PHYSFS_platformCalcBaseDir(const char *argv0);
 
 /*
  * Get the platform-specific user name.