diff --git a/Makefile.am b/Makefile.am
index c2fb3a2..eb20917 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -285,6 +285,7 @@ EXTRA_DIST = \
 	doc/susp_aaip_2_0.txt \
 	doc/susp_aaip_isofs_names.txt \
 	doc/zisofs_format.txt \
+	doc/zisofs2_format.txt \
 	doc/checksums.txt \
 	doc/boot_sectors.txt \
 	libisofs/libisofs.ver \
diff --git a/libisofs/rockridge.c b/libisofs/rockridge.c
index 22c6485..c4fb2fd 100644
--- a/libisofs/rockridge.c
+++ b/libisofs/rockridge.c
@@ -953,6 +953,7 @@ int pseudo_susp_add_PAD(Ecma119Image *t, struct susp_info *susp)
 
 /**
  * see doc/zisofs_format.txt : "ZF System Use Entry Format"
+ * see doc/zisofs2_format.txt : "ZF System Use Entry Format", "Z2 ..."
  */
 static
 int zisofs_add_ZF(Ecma119Image *t, struct susp_info *susp, int to_ce,
diff --git a/libisofs/rockridge_read.c b/libisofs/rockridge_read.c
index db27a5d..08db052 100644
--- a/libisofs/rockridge_read.c
+++ b/libisofs/rockridge_read.c
@@ -617,7 +617,8 @@ int read_aaip_AL(struct susp_sys_user_entry *sue,
 }
 
 /**
- * Reads the zisofs parameters from a ZF field (see doc/zisofs_format.txt).
+ * Reads the zisofs parameters from a ZF field (see doc/zisofs_format.txt
+ * and doc/zisofs2_format.txt).
  * 
  * @return 
  *      1 on success, < 0 on error