1 files changed, 4 insertions, 4 deletions
diff --git a/sql/log_event.cc b/sql/log_event.cc
index 27e81c8ecd3..1521de5b975 100644
--- a/sql/log_event.cc
+++ b/sql/log_event.cc
@@ -8605,10 +8605,10 @@ int Rows_log_event::find_row(const Relay_log_info *rli)
       the necessary bits on the bytes and don't set the filler bits
       correctly.
     */
-    my_ptrdiff_t const pos=
-      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
-    table->record[0][pos]= 0xFF;
-    
+    if (table->s->null_bytes > 0)
+      table->record[0][table->s->null_bytes - 1]|=
+        256U - (1U << table->s->last_null_bit_pos);
+
     if ((error= table->file->index_read_map(table->record[0], m_key, 
                                             HA_WHOLE_KEY,
                                             HA_READ_KEY_EXACT)))