diff --git a/ba/ba1600.cpp b/ba/ba1600.cpp
index a75ae87ba..ccd8628a8 100755
--- a/ba/ba1600.cpp
+++ b/ba/ba1600.cpp
@@ -1935,8 +1935,8 @@ bool TFascicolator_mask::set_version_info(const TFilename& filename,
       checksum = year + release + tag + patch;
       str.format("%04d.%02d.%02d.%04d.%04d", year, release, tag, patch, checksum);
 
-      TString oldfirm("XXXX.XX.XX.XXX.XXXX");
-      outfile.read(oldfirm.get_buffer(),19);
+      TString oldfirm("XXXX.XX.XX.XXXX.XXXX");
+      outfile.read(oldfirm.get_buffer(),20);
       if (oldfirm!=str)
       {
         outfile.seekp(position);