Index: libpam-mount-2.9/src/mount.c
===================================================================
--- libpam-mount-2.9.orig/src/mount.c	2011-04-07 02:03:21.000000000 +0200
+++ libpam-mount-2.9/src/mount.c	2011-04-07 19:28:50.238634647 +0200
@@ -30,6 +30,10 @@
 #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-2.9/src/pmvarrun.c
===================================================================
--- libpam-mount-2.9.orig/src/pmvarrun.c	2011-04-07 02:03:21.000000000 +0200
+++ libpam-mount-2.9/src/pmvarrun.c	2011-04-07 19:28:50.490640794 +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"
