diff --git a/libisoburn/libisoburn.h b/libisoburn/libisoburn.h
index 69ef45a7..d868f7bd 100644
--- a/libisoburn/libisoburn.h
+++ b/libisoburn/libisoburn.h
@@ -146,6 +146,10 @@ size.
 
 */
 
+/* Important: If you add a public API function then add its name to file
+                  libisoburn/libisoburn.ver
+*/
+
 
                           /* API functions */
 
diff --git a/xorriso/xorriso.h b/xorriso/xorriso.h
index 84d73585..aff46188 100644
--- a/xorriso/xorriso.h
+++ b/xorriso/xorriso.h
@@ -32,6 +32,11 @@
    libisoburn.h. One should not mix those calls with the ones of xorriso.h .
 */
 
+/* Important: If you add a public API function then add its name to file
+                  libisoburn/libisoburn.ver
+*/
+
+
 #ifndef Xorriso_includeD
 #define Xorriso_includeD yes
 
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 9d7cb8dd..3f5c0a0c 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2010.07.06.114102"
+#define Xorriso_timestamP "2010.07.06.114503"