diff --git a/libisoburn/trunk/xorriso/write_run.c b/libisoburn/trunk/xorriso/write_run.c
index 4b46c074..297602d5 100644
--- a/libisoburn/trunk/xorriso/write_run.c
+++ b/libisoburn/trunk/xorriso/write_run.c
@@ -2495,7 +2495,7 @@ int Xorriso_update_iso_lba0(struct XorrisO *xorriso, int iso_lba, int isosize,
      }
    } else {
      ret= 0;
-     if(drive != 0)
+     if(drive != NULL)
        ret= isoburn_read_iso_head(drive, iso_lba, &isosize, head_buffer, 2);
      if(ret<=0) {
        Xorriso_process_msg_queues(xorriso,0);
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index 10ea28b0..02b62f50 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2012.07.25.182507"
+#define Xorriso_timestamP "2012.07.25.184207"