diff --git a/mysql-test/r/gis.result b/mysql-test/r/gis.result
index 5663f167d00..7939d01beff 100644
--- a/mysql-test/r/gis.result
+++ b/mysql-test/r/gis.result
@@ -1014,6 +1014,14 @@ SET @a=0x00000000030000000100000000000000000000000000144000000000000014400000000
 SET @a=POLYFROMWKB(@a);
 SET @a=0x00000000030000000000000000000000000000000000144000000000000014400000000000001840000000000000184000000000000014400000000000001440;
 SET @a=POLYFROMWKB(@a);
+create table t1(a polygon NOT NULL)engine=myisam;
+insert into t1 values (geomfromtext("point(0 1)"));
+insert into t1 values (geomfromtext("point(1 0)"));
+select * from (select polygon(t1.a) as p from t1 order by t1.a) d;
+p
+NULL
+NULL
+drop table t1;
 End of 5.1 tests
 CREATE TABLE t1(
 col0 BINARY NOT NULL,
diff --git a/mysql-test/t/gis.test b/mysql-test/t/gis.test
index 4aad3f80b68..6c0fdda1cea 100644
--- a/mysql-test/t/gis.test
+++ b/mysql-test/t/gis.test
@@ -747,6 +747,16 @@ SET @a=0x00000000030000000000000000000000000000000000144000000000000014400000000
 SET @a=POLYFROMWKB(@a);
 
 
+#
+# Bug #57321    crashes and valgrind errors from spatial types
+#
+
+create table t1(a polygon NOT NULL)engine=myisam;
+insert into t1 values (geomfromtext("point(0 1)"));
+insert into t1 values (geomfromtext("point(1 0)"));
+select * from (select polygon(t1.a) as p from t1 order by t1.a) d;
+drop table t1;
+
 --echo End of 5.1 tests
 
 #
diff --git a/sql/item_geofunc.h b/sql/item_geofunc.h
index 84034841ad5..6145f72b665 100644
--- a/sql/item_geofunc.h
+++ b/sql/item_geofunc.h
@@ -181,6 +181,7 @@ public:
   String *val_str(String *);
   void fix_length_and_dec()
   {
+    Item_geometry_func::fix_length_and_dec();
     for (unsigned int i= 0; i < arg_count; ++i)
     {
       if (args[i]->fixed && args[i]->field_type() != MYSQL_TYPE_GEOMETRY)