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-rw-r--r--encoding.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/encoding.c b/encoding.c
index 4ee36d9111..e3a0978253 100644
--- a/encoding.c
+++ b/encoding.c
@@ -767,7 +767,7 @@ rb_enc_get_index(VALUE obj)
if (SPECIAL_CONST_P(obj)) {
if (!SYMBOL_P(obj)) return -1;
- obj = rb_id2str(SYM2ID(obj));
+ obj = rb_sym2str(obj);
}
switch (BUILTIN_TYPE(obj)) {
as_default: