diff --git a/mysql-test/r/partition_hash.result b/mysql-test/r/partition_hash.result
index 2165630e4fb..b72d47d3748 100644
--- a/mysql-test/r/partition_hash.result
+++ b/mysql-test/r/partition_hash.result
@@ -64,3 +64,9 @@ primary key(a,b))
 partition by key (a)
 (partition x1);
 drop table t1;
+CREATE TABLE t1 (f1 INTEGER, f2 char(20)) ENGINE = 'MYISAM' PARTITION BY HASH(f1) PARTITIONS 2;
+INSERT INTO t1 SET f1 = 0 - 1, f2 = '#######';
+select * from t1;
+f1	f2
+-1	#######
+drop table t1;
diff --git a/mysql-test/t/partition_hash.test b/mysql-test/t/partition_hash.test
index aa1acfe891f..6e3f0f67d47 100644
--- a/mysql-test/t/partition_hash.test
+++ b/mysql-test/t/partition_hash.test
@@ -75,3 +75,12 @@ partition by key (a)
 (partition x1);
 
 drop table t1;
+
+#
+# Bug# 15968 - crash when INSERT with f1 = -1 into partition by hash(f1)
+#
+CREATE TABLE t1 (f1 INTEGER, f2 char(20)) ENGINE = 'MYISAM' PARTITION BY HASH(f1) PARTITIONS 2;
+INSERT INTO t1 SET f1 = 0 - 1, f2 = '#######';
+select * from t1;
+drop table t1;
+
diff --git a/sql/sql_partition.cc b/sql/sql_partition.cc
index aca30226e27..20d14f5f196 100644
--- a/sql/sql_partition.cc
+++ b/sql/sql_partition.cc
@@ -2332,7 +2332,8 @@ static uint32 get_part_id_hash(uint no_parts,
                                Item *part_expr)
 {
   DBUG_ENTER("get_part_id_hash");
-  DBUG_RETURN((uint32)(part_expr->val_int() % no_parts));
+  longlong int_hash_id= part_expr->val_int() % no_parts;
+  DBUG_RETURN(int_hash_id < 0 ? -int_hash_id : int_hash_id);
 }