diff --git a/mysql-test/r/ctype_ldml.result b/mysql-test/r/ctype_ldml.result
index 222351cd5e2..3373e31539f 100644
--- a/mysql-test/r/ctype_ldml.result
+++ b/mysql-test/r/ctype_ldml.result
@@ -402,3 +402,8 @@ s1
 a
 b
 DROP TABLE t1;
+SET NAMES utf8 COLLATE utf8_phone_ci;
+SHOW COLLATION LIKE 'utf8_phone_ci';
+Collation	Charset	Id	Default	Compiled	Sortlen
+utf8_phone_ci	utf8	352			8
+SET NAMES utf8;
diff --git a/mysql-test/t/ctype_ldml.test b/mysql-test/t/ctype_ldml.test
index 7e469321d5b..99d9cd5a866 100644
--- a/mysql-test/t/ctype_ldml.test
+++ b/mysql-test/t/ctype_ldml.test
@@ -144,3 +144,11 @@ CREATE TABLE t1 (s1 char(10) character set utf8 collate utf8_maxuserid_ci);
 INSERT INTO t1 VALUES ('a'),('b');
 SELECT * FROM t1 WHERE s1='a' ORDER BY BINARY s1;
 DROP TABLE t1;
+
+
+#
+# Bug#47756 Setting 2byte collation ID with 'set names' crashes the server
+#
+SET NAMES utf8 COLLATE utf8_phone_ci;
+SHOW COLLATION LIKE 'utf8_phone_ci';
+SET NAMES utf8;
diff --git a/mysys/charset.c b/mysys/charset.c
index 280b2ad6091..e216f665092 100644
--- a/mysys/charset.c
+++ b/mysys/charset.c
@@ -255,6 +255,9 @@ static int add_collation(CHARSET_INFO *cs)
       {
 #if defined (HAVE_CHARSET_utf8) && defined(HAVE_UCA_COLLATIONS)
         copy_uca_collation(newcs, &my_charset_utf8_unicode_ci);
+        newcs->ctype= my_charset_utf8_unicode_ci.ctype;
+        if (init_state_maps(newcs))
+          return MY_XML_ERROR;
 #endif
       }
       else