diff --git a/st.c b/st.c
index 0c52e7a2ef..1a47525707 100644
--- a/st.c
+++ b/st.c
@@ -2283,7 +2283,7 @@ st_insert_generic(st_table *tab, long argc, const VALUE *argv, VALUE hash)
 
 /* Mimics ruby's { foo => bar } syntax. This function is placed here
    because it touches table internals and write barriers at once. */
-MJIT_FUNC_EXPORTED void
+void
 rb_hash_bulk_insert(long argc, const VALUE *argv, VALUE hash)
 {
     st_index_t n;