diff --git a/libisoburn/trunk/configure.ac b/libisoburn/trunk/configure.ac
index a8b84c2f..971dfea2 100644
--- a/libisoburn/trunk/configure.ac
+++ b/libisoburn/trunk/configure.ac
@@ -89,6 +89,11 @@ dnl >>> would need libisofs-0.6.1 or higher .so.6
 AC_CHECK_HEADER(libburn/libburn.h)
 AC_CHECK_HEADER(libisofs/libisofs.h)
 
+dnl Check for proper library versions
+LIBBURN_REQUIRED=0.4.2
+LIBISOFS_REQUIRED=0.6.1
+PKG_CHECK_MODULES(LIBBURN, libburn-1 >= $LIBBURN_REQUIRED)
+PKG_CHECK_MODULES(LIBISOFS, libisofs-1 >= $LIBISOFS_REQUIRED)
 
 dnl Add compiler-specific flags
 
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index b348afbf..683d7fbf 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2008.02.01.200153"
+#define Xorriso_timestamP "2008.02.02.131049"