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-rw-r--r--internal/encoding.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal/encoding.h b/internal/encoding.h
index c2ffaf4514..38bf8fc9da 100644
--- a/internal/encoding.h
+++ b/internal/encoding.h
@@ -29,6 +29,7 @@ void rb_encdb_declare(const char *name);
void rb_enc_set_base(const char *name, const char *orig);
int rb_enc_set_dummy(int index);
void rb_enc_raw_set(VALUE obj, rb_encoding *enc);
+int rb_enc_registered(const char *name);
PUREFUNC(int rb_data_is_encoding(VALUE obj));