diff --git a/mysql-test/suite/rpl/r/rpl_myisam_null_values.result b/mysql-test/suite/rpl/r/rpl_myisam_null_values.result
new file mode 100644
index 00000000000..574528a8d79
--- /dev/null
+++ b/mysql-test/suite/rpl/r/rpl_myisam_null_values.result
@@ -0,0 +1,24 @@
+stop slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+start slave;
+CREATE TABLE t1 (c1 BIT, c2 INT);
+INSERT INTO `t1` VALUES ( 1, 1 );
+UPDATE t1 SET c1=NULL where c2=1;
+Comparing tables master:test.t1 and slave:test.t1
+DELETE FROM t1 WHERE c2=1 LIMIT 1;
+Comparing tables master:test.t1 and slave:test.t1
+DROP TABLE t1;
+CREATE TABLE t1 (c1 CHAR);
+INSERT INTO t1 ( c1 ) VALUES ( 'w' ) ;
+SELECT * FROM t1;
+c1
+w
+# should trigger switch to row due to LIMIT
+UPDATE t1 SET c1=NULL WHERE c1='w' LIMIT 2;
+Comparing tables master:test.t1 and slave:test.t1
+DELETE FROM t1 LIMIT 2;
+Comparing tables master:test.t1 and slave:test.t1
+DROP TABLE t1;
diff --git a/mysql-test/suite/rpl/t/rpl_myisam_null_values.test b/mysql-test/suite/rpl/t/rpl_myisam_null_values.test
new file mode 100644
index 00000000000..d9ec95fc510
--- /dev/null
+++ b/mysql-test/suite/rpl/t/rpl_myisam_null_values.test
@@ -0,0 +1,53 @@
+# BUG#49481: RBR: MyISAM and bit fields may cause slave to stop on delete cant find record
+# BUG#49482: RBR: Replication may break on deletes when MyISAM tables + char field are used
+
+-- source include/master-slave.inc
+-- source include/have_binlog_format_mixed_or_row.inc
+
+-- connection master
+CREATE TABLE t1 (c1 BIT, c2 INT);
+INSERT INTO `t1` VALUES ( 1, 1 );
+UPDATE t1 SET c1=NULL where c2=1;
+-- sync_slave_with_master
+
+-- let $diff_table_1=master:test.t1
+-- let $diff_table_2=slave:test.t1
+-- source include/diff_tables.inc
+
+-- connection master
+DELETE FROM t1 WHERE c2=1 LIMIT 1;
+-- sync_slave_with_master
+
+-- let $diff_table_1=master:test.t1
+-- let $diff_table_2=slave:test.t1
+-- source include/diff_tables.inc
+
+-- connection master
+DROP TABLE t1;
+-- sync_slave_with_master
+
+-- connection master
+
+CREATE TABLE t1 (c1 CHAR);
+
+INSERT INTO t1 ( c1 ) VALUES ( 'w' ) ;
+SELECT * FROM t1;
+-- echo # should trigger switch to row due to LIMIT
+UPDATE t1 SET c1=NULL WHERE c1='w' LIMIT 2;
+-- sync_slave_with_master
+
+-- let $diff_table_1=master:test.t1
+-- let $diff_table_2=slave:test.t1
+-- source include/diff_tables.inc
+
+-- connection master
+DELETE FROM t1 LIMIT 2;
+-- sync_slave_with_master
+
+-- let $diff_table_1=master:test.t1
+-- let $diff_table_2=slave:test.t1
+-- source include/diff_tables.inc
+
+-- connection master
+DROP TABLE t1;
+-- sync_slave_with_master
diff --git a/sql/log_event.cc b/sql/log_event.cc
index 6b21087b6aa..61f5e93e29e 100644
--- a/sql/log_event.cc
+++ b/sql/log_event.cc
@@ -8724,6 +8724,24 @@ static bool record_compare(TABLE *table)
     }
   }
 
+  /**
+    Check if we are using MyISAM.
+
+    If this is a myisam table, then we cannot do a memcmp
+    right away because some NULL fields can still contain 
+    an old value in the row - they are not shown to the user
+    because the null bit is set, however, the contents are
+    not cleared. As such, plain memory comparison cannot be 
+    assured to work. See: BUG#49482 and BUG#49481.
+
+    On top of this, we do not store field contents for null 
+    fields in the binlog, so this is extra important when
+    comparing records fetched from binlog and from storage
+    engine.
+  */
+  if (table->file->ht->db_type == DB_TYPE_MYISAM)
+    goto record_compare_field_by_field;
+
   if (table->s->blob_fields + table->s->varchar_fields == 0)
   {
     result= cmp_record(table,record[1]);
@@ -8739,14 +8757,33 @@ static bool record_compare(TABLE *table)
     goto record_compare_exit;
   }
 
+record_compare_field_by_field:
+
   /* Compare updated fields */
   for (Field **ptr=table->field ; *ptr ; ptr++)
   {
-    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
+    Field *f= *ptr;
+
+    /* if just one of the fields is null then there is no match */
+    if ((f->is_null_in_record(table->record[0])) ==
+         !(f->is_null_in_record(table->record[1])))
     {
       result= TRUE;
       goto record_compare_exit;
     }
+
+    /* if both fields are not null then we can compare */
+    if (!(f->is_null_in_record(table->record[0])) &&
+        !(f->is_null_in_record(table->record[1])))
+    {
+      if (f->cmp_binary_offset(table->s->rec_buff_length))
+      {
+        result= TRUE;
+        goto record_compare_exit;
+      }
+    }
+
+    /* if both fields are null then there is a match. compare next field */
   }
 
 record_compare_exit:
diff --git a/sql/log_event_old.cc b/sql/log_event_old.cc
index 357bc78b1cd..72a6e159535 100644
--- a/sql/log_event_old.cc
+++ b/sql/log_event_old.cc
@@ -351,6 +351,24 @@ static bool record_compare(TABLE *table)
     }
   }
 
+  /**  
+    Check if we are using MyISAM.
+
+    If this is a myisam table, then we cannot do a memcmp
+    right away because some NULL fields can still contain 
+    an old value in the row - they are not shown to the user
+    because the null bit is set, however, the contents are
+    not cleared. As such, plain memory comparison cannot be 
+    assured to work. See: BUG#49482 and BUG#49481.
+
+    On top of this, we do not store field contents for null 
+    fields in the binlog, so this is extra important when
+    comparing records fetched from binlog and from storage
+    engine.
+  */
+  if (table->file->ht->db_type == DB_TYPE_MYISAM)
+    goto record_compare_field_by_field;
+
   if (table->s->blob_fields + table->s->varchar_fields == 0)
   {
     result= cmp_record(table,record[1]);
@@ -366,14 +384,33 @@ static bool record_compare(TABLE *table)
     goto record_compare_exit;
   }
 
+record_compare_field_by_field:
+
   /* Compare updated fields */
   for (Field **ptr=table->field ; *ptr ; ptr++)
   {
-    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
+    Field *f= *ptr;
+
+    /* if just one of the fields is null then there is no match */
+    if ((f->is_null_in_record(table->record[0])) ==
+         !(f->is_null_in_record(table->record[1])))
     {
       result= TRUE;
       goto record_compare_exit;
     }
+
+    /* if both fields are not null then we can compare */
+    if (!(f->is_null_in_record(table->record[0])) &&
+        !(f->is_null_in_record(table->record[1])))
+    {
+      if (f->cmp_binary_offset(table->s->rec_buff_length))
+      {
+        result= TRUE;
+        goto record_compare_exit;
+      }
+    }
+
+    /* if both fields are null then there is a match. compare next field */
   }
 
 record_compare_exit: