diff --git a/mysql-test/suite/innodb/r/innodb_mysql.result b/mysql-test/suite/innodb/r/innodb_mysql.result
index ba8ac0ba86c..0a76a1fbcec 100644
--- a/mysql-test/suite/innodb/r/innodb_mysql.result
+++ b/mysql-test/suite/innodb/r/innodb_mysql.result
@@ -2588,3 +2588,23 @@ Extra	Using index
 DROP TABLE t1;
 #
 End of 5.1 tests
+#
+# Test for bug #39932 "create table fails if column for FK is in different
+#                      case than in corr index".
+#
+drop tables if exists t1, t2;
+create table t1 (pk int primary key) engine=InnoDB;
+# Even although the below statement uses uppercased field names in
+# foreign key definition it still should be able to find explicitly
+# created supporting index. So it should succeed and should not
+# create any additional supporting indexes.
+create table t2 (fk int, key x (fk),
+constraint x foreign key (FK) references t1 (PK)) engine=InnoDB;
+show create table t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `fk` int(11) DEFAULT NULL,
+  KEY `x` (`fk`),
+  CONSTRAINT `x` FOREIGN KEY (`fk`) REFERENCES `t1` (`pk`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+drop table t2, t1;
diff --git a/mysql-test/suite/innodb/t/innodb_mysql.test b/mysql-test/suite/innodb/t/innodb_mysql.test
index ae03bebfbe3..cb534068c6e 100644
--- a/mysql-test/suite/innodb/t/innodb_mysql.test
+++ b/mysql-test/suite/innodb/t/innodb_mysql.test
@@ -813,3 +813,21 @@ DROP TABLE t1;
 
 
 --echo End of 5.1 tests
+
+
+--echo #
+--echo # Test for bug #39932 "create table fails if column for FK is in different
+--echo #                      case than in corr index".
+--echo #
+--disable_warnings
+drop tables if exists t1, t2;
+--enable_warnings
+create table t1 (pk int primary key) engine=InnoDB;
+--echo # Even although the below statement uses uppercased field names in
+--echo # foreign key definition it still should be able to find explicitly
+--echo # created supporting index. So it should succeed and should not
+--echo # create any additional supporting indexes.
+create table t2 (fk int, key x (fk),
+                 constraint x foreign key (FK) references t1 (PK)) engine=InnoDB;
+show create table t2;
+drop table t2, t1;
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index 7c52e6957cc..44bb6d51c6c 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -91,7 +91,9 @@ extern "C" void free_user_var(user_var_entry *entry)
 
 bool Key_part_spec::operator==(const Key_part_spec& other) const
 {
-  return length == other.length && !strcmp(field_name, other.field_name);
+  return length == other.length &&
+         !my_strcasecmp(system_charset_info, field_name,
+                        other.field_name);
 }
 
 /**