diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc
index bf37a3d6d69..f3ed3ebab24 100644
--- a/sql/sql_insert.cc
+++ b/sql/sql_insert.cc
@@ -947,20 +947,24 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
   if (values_list.elements == 1 && (!(thd->options & OPTION_WARNINGS) ||
 				    !thd->cuted_fields))
   {
-    thd->row_count_func= info.copied+info.deleted+info.updated;
+    thd->row_count_func= info.copied + info.deleted +
+                         ((thd->client_capabilities & CLIENT_FOUND_ROWS) ?
+                          info.touched : info.updated);
     send_ok(thd, (ulong) thd->row_count_func, id);
   }
   else
   {
     char buff[160];
+    ha_rows updated=((thd->client_capabilities & CLIENT_FOUND_ROWS) ?
+                     info.touched : info.updated);
     if (ignore)
       sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
 	      (lock_type == TL_WRITE_DELAYED) ? (ulong) 0 :
 	      (ulong) (info.records - info.copied), (ulong) thd->cuted_fields);
     else
       sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
-	      (ulong) (info.deleted+info.updated), (ulong) thd->cuted_fields);
-    thd->row_count_func= info.copied+info.deleted+info.updated;
+	      (ulong) (info.deleted + updated), (ulong) thd->cuted_fields);
+    thd->row_count_func= info.copied + info.deleted + updated;
     ::send_ok(thd, (ulong) thd->row_count_func, id, buff);
   }
   thd->abort_on_warning= 0;
@@ -2973,7 +2977,9 @@ bool select_insert::send_eof()
   else
     sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
 	    (ulong) (info.deleted+info.updated), (ulong) thd->cuted_fields);
-  thd->row_count_func= info.copied+info.deleted+info.updated;
+  thd->row_count_func= info.copied + info.deleted +
+                       ((thd->client_capabilities & CLIENT_FOUND_ROWS) ?
+                        info.touched : info.updated);
   ::send_ok(thd, (ulong) thd->row_count_func, last_insert_id, buff);
   DBUG_RETURN(0);
 }
diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c
index e56dd693287..54d29dbd683 100644
--- a/tests/mysql_client_test.c
+++ b/tests/mysql_client_test.c
@@ -15623,6 +15623,69 @@ static void test_bug27876()
 }
 
 
+/*
+  Bug#28505: mysql_affected_rows() returns wrong value if CLIENT_FOUND_ROWS
+  flag is set.
+*/
+static void test_bug28505()
+{
+  MYSQL *l_mysql;
+  my_bool error= 0;
+  my_ulonglong res;
+
+  if (!(l_mysql= mysql_init(NULL)))
+  {
+    myerror("mysql_init() failed");
+    DIE_UNLESS(1);
+  }
+  if (!(mysql_real_connect(l_mysql, opt_host, opt_user,
+                           opt_password, current_db, opt_port,
+                           opt_unix_socket, CLIENT_FOUND_ROWS)))
+  {
+    myerror("connection failed");
+    error= 1;
+    goto end;
+  }
+  l_mysql->reconnect= 1;
+  if (mysql_query(l_mysql, "drop table if exists t1"))
+  {
+    myerror(NULL);
+    error= 1;
+    goto end;
+  }
+  if (mysql_query(l_mysql, "create table t1(f1 int primary key)"))
+  {
+    myerror(NULL);
+    error= 1;
+    goto end;
+  }
+  if (mysql_query(l_mysql, "insert into t1 values(1)"))
+  {
+    myerror(NULL);
+    error= 1;
+    goto end;
+  }
+  if (mysql_query(l_mysql,
+                  "insert into t1 values(1) on duplicate key update f1=1"))
+  {
+    myerror(NULL);
+    error= 1;
+    goto end;
+  }
+  res= mysql_affected_rows(l_mysql);
+  if (!res)
+    error= 1;
+  if (mysql_query(l_mysql, "drop table t1"))
+  {
+    myerror(NULL);
+    error= 1;
+  }
+end:
+  mysql_close(l_mysql);
+  DIE_UNLESS(error == 0);
+}
+
+
 /*
   Read and parse arguments and MySQL options from my.cnf
 */
@@ -15904,6 +15967,7 @@ static struct my_tests_st my_tests[]= {
   { "test_bug21635", test_bug21635 },
   { "test_bug24179", test_bug24179 },
   { "test_bug27876", test_bug27876 },
+  { "test_bug28505", test_bug28505 },
   { 0, 0 }
 };