1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 05bbbc74c8..10819a21c7 100644
--- a/internal.h
+++ b/internal.h
@@ -428,6 +428,7 @@ NORETURN(void rb_syserr_fail_path_in(const char *func_name, int err, VALUE path)
 /* gc.c */
 void Init_heap(void);
 void *ruby_mimmalloc(size_t size);
+void ruby_mimfree(void *ptr);
 void rb_objspace_set_event_hook(const rb_event_flag_t event);
 void rb_gc_writebarrier_remember_promoted(VALUE obj);