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-rw-r--r--include/ruby/intern.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index fd37ecab2..91551079d 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -791,6 +791,7 @@ VALUE rb_ivar_get(VALUE, ID);
VALUE rb_ivar_set(VALUE, ID, VALUE);
VALUE rb_ivar_defined(VALUE, ID);
void rb_ivar_foreach(VALUE, int (*)(ANYARGS), st_data_t);
+st_index_t rb_ivar_count(VALUE);
VALUE rb_iv_set(VALUE, const char*, VALUE);
VALUE rb_iv_get(VALUE, const char*);
VALUE rb_attr_get(VALUE, ID);