diff --git a/src/arena-meta.c b/src/arena-meta.c
index 401231ac..bc98d3f9 100644
--- a/src/arena-meta.c
+++ b/src/arena-meta.c
@@ -155,6 +155,7 @@ void _mi_meta_free(void* p, size_t size, mi_memid_t memid) {
   }
 }
 
+// used for debug output
 bool _mi_meta_is_meta_page(void* p) 
 {
   mi_meta_page_t* mpage0 = mi_atomic_load_ptr_acquire(mi_meta_page_t, &mi_meta_pages);
@@ -164,4 +165,4 @@ bool _mi_meta_is_meta_page(void* p)
     mpage = mi_meta_page_next(mpage);    
   }
   return false;
-}
\ No newline at end of file
+}