diff --git a/src/backend/utils/adt/jsonfuncs.c b/src/backend/utils/adt/jsonfuncs.c
index 89dc96a77f9..386a70d6d82 100644
--- a/src/backend/utils/adt/jsonfuncs.c
+++ b/src/backend/utils/adt/jsonfuncs.c
@@ -507,6 +507,8 @@ static JsonParseErrorType transform_string_values_array_element_start(void *stat
 static JsonParseErrorType transform_string_values_scalar(void *state, char *token, JsonTokenType tokentype);
 
 static Oid	get_json_cast_for_type(Oid typoid);
+static void json_check_mutability_internal(Oid typoid, bool use_casts,
+										   bool *has_mutable);
 
 /*
  * pg_parse_json_or_errsave
@@ -6079,6 +6081,17 @@ json_categorize_type(Oid typoid, bool is_jsonb,
  */
 void
 json_check_mutability(Oid typoid, bool *has_mutable)
+{
+	json_check_mutability_internal(typoid, true, has_mutable);
+}
+
+/*
+ * use_casts is false below a range or multirange: those are printed by
+ * range_out/multirange_out, which call the subtype's output function and
+ * never a cast to json.
+ */
+static void
+json_check_mutability_internal(Oid typoid, bool use_casts, bool *has_mutable)
 {
 	char		att_typtype = get_typtype(typoid);
 
@@ -6092,7 +6105,8 @@ json_check_mutability(Oid typoid, bool *has_mutable)
 
 	if (att_typtype == TYPTYPE_DOMAIN)
 	{
-		json_check_mutability(getBaseType(typoid), has_mutable);
+		json_check_mutability_internal(getBaseType(typoid), use_casts,
+									   has_mutable);
 		return;
 	}
 	else if (att_typtype == TYPTYPE_COMPOSITE)
@@ -6108,7 +6122,7 @@ json_check_mutability(Oid typoid, bool *has_mutable)
 			 att_typtype == TYPTYPE_MULTIRANGE)
 	{
 		/* a cast to json, if any, is used instead of the output function */
-		Oid			castfunc = get_json_cast_for_type(typoid);
+		Oid			castfunc = use_casts ? get_json_cast_for_type(typoid) : InvalidOid;
 
 		if (OidIsValid(castfunc))
 		{
@@ -6116,9 +6130,11 @@ json_check_mutability(Oid typoid, bool *has_mutable)
 				*has_mutable = true;
 		}
 		else if (att_typtype == TYPTYPE_RANGE)
-			json_check_mutability(get_range_subtype(typoid), has_mutable);
+			json_check_mutability_internal(get_range_subtype(typoid), false,
+										   has_mutable);
 		else
-			json_check_mutability(get_multirange_range(typoid), has_mutable);
+			json_check_mutability_internal(get_multirange_range(typoid), false,
+										   has_mutable);
 		return;
 	}
 	else
@@ -6128,7 +6144,7 @@ json_check_mutability(Oid typoid, bool *has_mutable)
 		if (OidIsValid(att_typelem))
 		{
 			/* recurse into array element type */
-			json_check_mutability(att_typelem, has_mutable);
+			json_check_mutability_internal(att_typelem, use_casts, has_mutable);
 			return;
 		}
 	}
@@ -6166,7 +6182,7 @@ json_check_mutability(Oid typoid, bool *has_mutable)
 
 		default:
 			{
-				Oid			funcoid = get_json_cast_for_type(typoid);
+				Oid			funcoid = use_casts ? get_json_cast_for_type(typoid) : InvalidOid;
 
 				if (!OidIsValid(funcoid))
 				{