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-rw-r--r--ext/json/generator/generator.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/json/generator/generator.c b/ext/json/generator/generator.c
index 362eff7f73..1213f42497 100644
--- a/ext/json/generator/generator.c
+++ b/ext/json/generator/generator.c
@@ -1113,7 +1113,7 @@ static VALUE string_config(VALUE config)
if (RTEST(config)) {
Check_Type(config, T_STRING);
if (RSTRING_LEN(config)) {
- return RB_OBJ_FROZEN(config) ? config : rb_str_freeze(rb_str_dup(config));
+ return rb_str_new_frozen(config);
}
}
return Qfalse;