diff --git a/scsh/syscalls1.c b/scsh/syscalls1.c
index f4550ee..fa9203f 100644
--- a/scsh/syscalls1.c
+++ b/scsh/syscalls1.c
@@ -178,11 +178,13 @@ int set_cloexec(int fd, int val)
 
 /* Posix rules: If PATH_MAX is defined, it's the length of longest path.
 ** Otherwise, _POSIX_PATH_MAX = 255, and is a lower bound on said length.
+** I'm writing out 255 as a literal because HP-UX isn't finding 
+** _POSIX_PATH_MAX.
 */
 #ifdef PATH_MAX
 #define scsh_path_max (PATH_MAX)
 #else
-#define scsh_path_max (_POSIX_PATH_MAX)
+#define scsh_path_max (255)
 #endif
 
 /* Simple-minded POSIX version. */