diff --git a/mysql-test/main/cast.test b/mysql-test/main/cast.test
index ce4b1f6a574..5a0f87beb69 100644
--- a/mysql-test/main/cast.test
+++ b/mysql-test/main/cast.test
@@ -768,14 +768,11 @@ INSERT INTO t1 VALUES (-1.0);
 SELECT * FROM t1;
 DROP TABLE t1;
 
-#enable after MDEV-32645 is fixed
---disable_view_protocol
 SELECT CAST(-1e0 AS UNSIGNED);
 CREATE TABLE t1 (a BIGINT UNSIGNED);
 INSERT INTO t1 VALUES (-1e0);
 SELECT * FROM t1;
 DROP TABLE t1;
---enable_view_protocol
 
 SELECT CAST(-1e308 AS UNSIGNED);
 CREATE TABLE t1 (a BIGINT UNSIGNED);
diff --git a/mysql-test/main/type_float.result b/mysql-test/main/type_float.result
index 500f906642d..fa850cf9b34 100644
--- a/mysql-test/main/type_float.result
+++ b/mysql-test/main/type_float.result
@@ -1167,5 +1167,42 @@ d	50
 fdbl	123.456.789,12345678000000000000000000000000000000
 fdec	123.456.789,12345678900000000000000000000000000000
 #
+# MDEV-32645 CAST(AS UNSIGNED) fails with --view-protocol
+#
+SELECT
+CAST(-1e0 AS UNSIGNED),
+CAST(--2e0 AS UNSIGNED),
+CAST(---3e0 AS UNSIGNED),
+CAST(----4e0 AS UNSIGNED);
+CAST(-1e0 AS UNSIGNED)	CAST(--2e0 AS UNSIGNED)	CAST(---3e0 AS UNSIGNED)	CAST(----4e0 AS UNSIGNED)
+0	2	0	4
+Warnings:
+Note	1916	Got overflow when converting '-1' to UNSIGNED BIGINT. Value truncated
+Note	1916	Got overflow when converting '-3' to UNSIGNED BIGINT. Value truncated
+EXPLAIN EXTENDED SELECT
+CAST(-1e0 AS UNSIGNED),
+CAST(--2e0 AS UNSIGNED),
+CAST(---3e0 AS UNSIGNED),
+CAST(----4e0 AS UNSIGNED);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+Warnings:
+Note	1003	select cast(-1e0 as unsigned) AS `CAST(-1e0 AS UNSIGNED)`,cast(2e0 as unsigned) AS `CAST(--2e0 AS UNSIGNED)`,cast(-3e0 as unsigned) AS `CAST(---3e0 AS UNSIGNED)`,cast(4e0 as unsigned) AS `CAST(----4e0 AS UNSIGNED)`
+CREATE VIEW v1 AS SELECT
+CAST(-1e0 AS UNSIGNED),
+CAST(--2e0 AS UNSIGNED),
+CAST(---3e0 AS UNSIGNED),
+CAST(----4e0 AS UNSIGNED);
+SHOW CREATE VIEW v1;
+View	Create View	character_set_client	collation_connection
+v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select cast(-1e0 as unsigned) AS `CAST(-1e0 AS UNSIGNED)`,cast(2e0 as unsigned) AS `CAST(--2e0 AS UNSIGNED)`,cast(-3e0 as unsigned) AS `CAST(---3e0 AS UNSIGNED)`,cast(4e0 as unsigned) AS `CAST(----4e0 AS UNSIGNED)`	latin1	latin1_swedish_ci
+SELECT * FROM v1;
+CAST(-1e0 AS UNSIGNED)	CAST(--2e0 AS UNSIGNED)	CAST(---3e0 AS UNSIGNED)	CAST(----4e0 AS UNSIGNED)
+0	2	0	4
+Warnings:
+Note	1916	Got overflow when converting '-1' to UNSIGNED BIGINT. Value truncated
+Note	1916	Got overflow when converting '-3' to UNSIGNED BIGINT. Value truncated
+DROP VIEW v1;
+#
 # End of 10.4 tests
 #
diff --git a/mysql-test/main/type_float.test b/mysql-test/main/type_float.test
index f1041080e26..f1d74f2f8d7 100644
--- a/mysql-test/main/type_float.test
+++ b/mysql-test/main/type_float.test
@@ -713,6 +713,32 @@ $$
 DELIMITER ;$$
 --horizontal_results
 
+--echo #
+--echo # MDEV-32645 CAST(AS UNSIGNED) fails with --view-protocol
+--echo #
+
+SELECT
+  CAST(-1e0 AS UNSIGNED),
+  CAST(--2e0 AS UNSIGNED),
+  CAST(---3e0 AS UNSIGNED),
+  CAST(----4e0 AS UNSIGNED);
+
+EXPLAIN EXTENDED SELECT
+  CAST(-1e0 AS UNSIGNED),
+  CAST(--2e0 AS UNSIGNED),
+  CAST(---3e0 AS UNSIGNED),
+  CAST(----4e0 AS UNSIGNED);
+
+CREATE VIEW v1 AS SELECT
+  CAST(-1e0 AS UNSIGNED),
+  CAST(--2e0 AS UNSIGNED),
+  CAST(---3e0 AS UNSIGNED),
+  CAST(----4e0 AS UNSIGNED);
+
+SHOW CREATE VIEW v1;
+SELECT * FROM v1;
+DROP VIEW v1;
+
 --echo #
 --echo # End of 10.4 tests
 --echo #
diff --git a/sql/item.cc b/sql/item.cc
index 21190b38e1a..6d30d63bc11 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -6896,7 +6896,25 @@ Item *Item_float::neg(THD *thd)
   else if (value < 0 && max_length)
     max_length--;
   value= -value;
-  presentation= 0;
+  if (presentation)
+  {
+    if (*presentation == '-')
+    {
+      // Strip double minus: -(-1) -> '1' instead of '--1'
+      presentation++;
+    }
+    else
+    {
+      size_t presentation_length= strlen(presentation);
+      if (char *tmp= (char*) thd->alloc(presentation_length + 2))
+      {
+        tmp[0]= '-';
+        // Copy with the trailing '\0'
+        memcpy(tmp + 1, presentation, presentation_length + 1);
+        presentation= tmp;
+      }
+    }
+  }
   name= null_clex_str;
   return this;
 }