diff --git a/src/backend/parser/parse_coerce.c b/src/backend/parser/parse_coerce.c
index dd3e748c9f..895c3ad985 100644
--- a/src/backend/parser/parse_coerce.c
+++ b/src/backend/parser/parse_coerce.c
@@ -219,7 +219,7 @@ coerce_type(ParseState *pstate, Node *node,
 
 		newcon->consttype = baseTypeId;
 		newcon->consttypmod = inputTypeMod;
-		newcon->constcollid = get_typcollation(newcon->consttype);
+		newcon->constcollid = typeTypeCollation(targetType);
 		newcon->constlen = typeLen(targetType);
 		newcon->constbyval = typeByVal(targetType);
 		newcon->constisnull = con->constisnull;
diff --git a/src/backend/parser/parse_type.c b/src/backend/parser/parse_type.c
index f413593f60..ac62cbc8c3 100644
--- a/src/backend/parser/parse_type.c
+++ b/src/backend/parser/parse_type.c
@@ -528,7 +528,7 @@ typeLen(Type t)
 	return typ->typlen;
 }
 
-/* given type (as type struct), return the value of its 'byval' attribute.*/
+/* given type (as type struct), return its 'byval' attribute */
 bool
 typeByVal(Type t)
 {
@@ -538,7 +538,7 @@ typeByVal(Type t)
 	return typ->typbyval;
 }
 
-/* given type (as type struct), return the name of type */
+/* given type (as type struct), return the type's name */
 char *
 typeTypeName(Type t)
 {
@@ -549,16 +549,26 @@ typeTypeName(Type t)
 	return pstrdup(NameStr(typ->typname));
 }
 
+/* given type (as type struct), return its 'typrelid' attribute */
 Oid
 typeTypeRelid(Type typ)
 {
 	Form_pg_type typtup;
 
 	typtup = (Form_pg_type) GETSTRUCT(typ);
-
 	return typtup->typrelid;
 }
 
+/* given type (as type struct), return its 'typcollation' attribute */
+Oid
+typeTypeCollation(Type typ)
+{
+	Form_pg_type typtup;
+
+	typtup = (Form_pg_type) GETSTRUCT(typ);
+	return typtup->typcollation;
+}
+
 /*
  * Given a type structure and a string, returns the internal representation
  * of that string.	The "string" can be NULL to perform conversion of a NULL
diff --git a/src/include/parser/parse_type.h b/src/include/parser/parse_type.h
index 92c9ecba4a..509e3b7f11 100644
--- a/src/include/parser/parse_type.h
+++ b/src/include/parser/parse_type.h
@@ -40,6 +40,7 @@ extern int16 typeLen(Type t);
 extern bool typeByVal(Type t);
 extern char *typeTypeName(Type t);
 extern Oid	typeTypeRelid(Type typ);
+extern Oid	typeTypeCollation(Type typ);
 extern Datum stringTypeDatum(Type tp, char *string, int32 atttypmod);
 
 extern Oid	typeidTypeRelid(Oid type_id);