diff --git a/xorriso/opts_i_o.c b/xorriso/opts_i_o.c
index 05568046..4f2caa35 100644
--- a/xorriso/opts_i_o.c
+++ b/xorriso/opts_i_o.c
@@ -103,6 +103,22 @@ int Xorriso_option_joliet(struct XorrisO *xorriso, char *mode, int flag)
 }
 
 
+/* Command -joliet_map */
+int Xorriso_option_joliet_map(struct XorrisO *xorriso, char *mode, int flag)
+{
+ if(strcmp(mode, "unmapped") == 0) {
+   xorriso->joliet_map= 0;
+ } else if(strcmp(mode, "stripped") == 0) {
+   xorriso->joliet_map= 1;
+ } else {
+   sprintf(xorriso->info_text, "-joliet_map: unknown mode '%s'", mode);
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 0);
+   return(0);
+ }
+ return(1);
+}
+
+
 /* Command -launch_frontend */
 int Xorriso_option_launch_frontend(struct XorrisO *xorriso,
                                    int argc, char **argv, int *idx, int flag)
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 6a4584f4..00d573dc 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2020.11.22.135052"
+#define Xorriso_timestamP "2020.12.04.103410"