diff --git a/mysql-test/r/ps.result b/mysql-test/r/ps.result
index 6dfc7e80ba0cb..6857ebc68af21 100644
--- a/mysql-test/r/ps.result
+++ b/mysql-test/r/ps.result
@@ -3388,7 +3388,7 @@ CREATE TEMPORARY TABLE tmp1 AS SELECT @a AS c1;
 SHOW CREATE TABLE tmp1;
 Table	Create Table
 tmp1	CREATE TEMPORARY TABLE `tmp1` (
-  `c1` bigint(20) DEFAULT NULL
+  `c1` bigint(20) unsigned DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SELECT @a, @a = b'10100100101';
 @a	@a = b'10100100101'
@@ -3478,7 +3478,7 @@ CREATE TEMPORARY TABLE tmp1 AS SELECT @a AS c1;
 SHOW CREATE TABLE tmp1;
 Table	Create Table
 tmp1	CREATE TEMPORARY TABLE `tmp1` (
-  `c1` bigint(20) DEFAULT NULL
+  `c1` bigint(20) unsigned DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SELECT @a, @a = 2010;
 @a	@a = 2010
@@ -5029,3 +5029,48 @@ COERCIBILITY(?)
 EXECUTE IMMEDIATE "SELECT COERCIBILITY(?)" USING TIMESTAMP'2001-01-01 10:20:30';
 COERCIBILITY(?)
 5
+#
+# MDEV-14435 Different UNSIGNED flag of out user variable for YEAR parameter for direct vs prepared CALL
+#
+CREATE PROCEDURE p1(OUT v INT UNSIGNED) SET v = 2010;
+CALL p1(@a);
+PREPARE stmt FROM 'CALL p1(?)';
+EXECUTE stmt USING @b;
+DEALLOCATE PREPARE stmt;
+CREATE TABLE t1 AS SELECT @a AS a, @b AS b;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` bigint(20) unsigned DEFAULT NULL,
+  `b` bigint(20) unsigned DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+DROP PROCEDURE p1;
+CREATE PROCEDURE p1(OUT v YEAR) SET v = 2010;
+CALL p1(@a);
+PREPARE stmt FROM 'CALL p1(?)';
+EXECUTE stmt USING @b;
+DEALLOCATE PREPARE stmt;
+CREATE TABLE t1 AS SELECT @a AS a, @b AS b;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` bigint(20) unsigned DEFAULT NULL,
+  `b` bigint(20) unsigned DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+DROP PROCEDURE p1;
+CREATE PROCEDURE p1(OUT v BIT(16)) SET v = 2010;
+CALL p1(@a);
+PREPARE stmt FROM 'CALL p1(?)';
+EXECUTE stmt USING @b;
+DEALLOCATE PREPARE stmt;
+CREATE TABLE t1 AS SELECT @a AS a, @b AS b;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` bigint(20) unsigned DEFAULT NULL,
+  `b` bigint(20) unsigned DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+DROP PROCEDURE p1;
diff --git a/mysql-test/t/ps.test b/mysql-test/t/ps.test
index 90f2b7179f9d1..a7683b5aae6ae 100644
--- a/mysql-test/t/ps.test
+++ b/mysql-test/t/ps.test
@@ -4495,3 +4495,37 @@ EXECUTE IMMEDIATE "SELECT COERCIBILITY(?)" USING 5.5;
 EXECUTE IMMEDIATE "SELECT COERCIBILITY(?)" USING 5.5e0;
 EXECUTE IMMEDIATE "SELECT COERCIBILITY(?)" USING TIME'10:20:30';
 EXECUTE IMMEDIATE "SELECT COERCIBILITY(?)" USING TIMESTAMP'2001-01-01 10:20:30';
+
+--echo #
+--echo # MDEV-14435 Different UNSIGNED flag of out user variable for YEAR parameter for direct vs prepared CALL
+--echo #
+
+CREATE PROCEDURE p1(OUT v INT UNSIGNED) SET v = 2010;
+CALL p1(@a);
+PREPARE stmt FROM 'CALL p1(?)';
+EXECUTE stmt USING @b;
+DEALLOCATE PREPARE stmt;
+CREATE TABLE t1 AS SELECT @a AS a, @b AS b;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+DROP PROCEDURE p1;
+
+CREATE PROCEDURE p1(OUT v YEAR) SET v = 2010;
+CALL p1(@a);
+PREPARE stmt FROM 'CALL p1(?)';
+EXECUTE stmt USING @b;
+DEALLOCATE PREPARE stmt;
+CREATE TABLE t1 AS SELECT @a AS a, @b AS b;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+DROP PROCEDURE p1;
+
+CREATE PROCEDURE p1(OUT v BIT(16)) SET v = 2010;
+CALL p1(@a);
+PREPARE stmt FROM 'CALL p1(?)';
+EXECUTE stmt USING @b;
+DEALLOCATE PREPARE stmt;
+CREATE TABLE t1 AS SELECT @a AS a, @b AS b;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+DROP PROCEDURE p1;
diff --git a/sql/item.cc b/sql/item.cc
index 63373fc1b0d08..029f8216bf1c9 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -4247,6 +4247,7 @@ Item_param::set_value(THD *thd, sp_rcontext *ctx, Item **it)
   }
 
   null_value= FALSE;
+  unsigned_flag= arg->unsigned_flag;
 
   switch (arg->result_type()) {
   case STRING_RESULT: