Index: libpam-mount-2.5/src/mount.c
===================================================================
--- libpam-mount-2.5.orig/src/mount.c	2010-09-01 21:11:43.000000000 +0200
+++ libpam-mount-2.5/src/mount.c	2010-09-01 21:12:15.000000000 +0200
@@ -29,6 +29,10 @@
 #include <pwd.h>
 #include "pam_mount.h"
 
+#ifndef PATH_MAX
+#define PATH_MAX 4096 /* Hurd does not define PATH_MAX in limits.h */
+#endif
+
 /* Functions */
 static inline bool mkmountpoint(struct vol *, const char *);
 
Index: libpam-mount-2.5/src/pmvarrun.c
===================================================================
--- libpam-mount-2.5.orig/src/pmvarrun.c	2010-09-01 21:11:43.000000000 +0200
+++ libpam-mount-2.5/src/pmvarrun.c	2010-09-01 21:12:01.000000000 +0200
@@ -33,6 +33,10 @@ pmvarrun.c -- Updates /var/run/pam_mount
 #include <pwd.h>
 #include "pam_mount.h"
 
+#ifndef PATH_MAX
+#define PATH_MAX 4096 /* Hurd does not define PATH_MAX in limits.h */
+#endif
+
 /* Definitions */
 #define ASCIIZ_LLX      sizeof("0xFFFFFFFF""FFFFFFFF")
 #define VAR_RUN         "/var/run"
