Index: trunk/backend/escl/escl_capabilities.c
===================================================================
--- trunk.orig/backend/escl/escl_capabilities.c
+++ trunk/backend/escl/escl_capabilities.c
@@ -35,6 +35,10 @@
 
 #include "../include/sane/saneopts.h"
 
+#ifndef PATH_MAX
+    #define PATH_MAX 4096
+#endif
+
 struct cap
 {
     char *memory;