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-rw-r--r--include/ruby/encoding.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/encoding.h b/include/ruby/encoding.h
index 32d874aa9d..93939ee7db 100644
--- a/include/ruby/encoding.h
+++ b/include/ruby/encoding.h
@@ -124,6 +124,7 @@ int rb_enc_get_index(VALUE obj);
void rb_enc_set_index(VALUE obj, int encindex);
int rb_enc_capable(VALUE obj);
int rb_enc_find_index(const char *name);
+int rb_enc_alias(const char *alias, const char *orig);
int rb_to_encoding_index(VALUE);
rb_encoding *rb_to_encoding(VALUE);
rb_encoding *rb_find_encoding(VALUE);