diff --git a/mysql-test/r/innodb_bug40565.result b/mysql-test/r/innodb_bug40565.result
new file mode 100644
index 00000000000..21e923d9336
--- /dev/null
+++ b/mysql-test/r/innodb_bug40565.result
@@ -0,0 +1,9 @@
+create table bug40565(value decimal(4,2)) engine=innodb;
+insert into bug40565 values (1), (null);
+update bug40565 set value=NULL;
+affected rows: 1
+info: Rows matched: 2  Changed: 1  Warnings: 0
+update bug40565 set value=NULL;
+affected rows: 0
+info: Rows matched: 2  Changed: 0  Warnings: 0
+drop table bug40565;
diff --git a/mysql-test/t/innodb_bug40565.test b/mysql-test/t/innodb_bug40565.test
new file mode 100644
index 00000000000..d7aa0fd514a
--- /dev/null
+++ b/mysql-test/t/innodb_bug40565.test
@@ -0,0 +1,10 @@
+# Bug #40565 Update Query Results in "1 Row Affected" But Should Be "Zero Rows"
+-- source include/have_innodb.inc
+
+create table bug40565(value decimal(4,2)) engine=innodb;
+insert into bug40565 values (1), (null);
+--enable_info
+update bug40565 set value=NULL;
+update bug40565 set value=NULL;
+--disable_info
+drop table bug40565;