1 files changed, 2 insertions, 2 deletions
diff --git a/intern.h b/intern.h
index e3fec0967e..1d0f38b60d 100644
--- a/intern.h
+++ b/intern.h
@@ -182,8 +182,8 @@ char *rb_find_file _((char*));
 void rb_gc_mark_locations _((VALUE*, VALUE*));
 void rb_mark_tbl _((struct st_table*));
 void rb_mark_hash _((struct st_table*));
-void rb_gc_mark_maybe _((void*));
-void rb_gc_mark _((void*));
+void rb_gc_mark_maybe _((VALUE));
+void rb_gc_mark _((VALUE));
 void rb_gc_force_recycle _((VALUE));
 void rb_gc _((void));
 void rb_gc_call_finalizer_at_exit _((void));