diff --git a/common/dlmalloc.c b/common/dlmalloc.c
index ae5702dd52ae178d0e0e16d46a173dbdd927d75c..fce7a762b1ed177906f03968c2ca0f4a8dcacbbf 100644
--- a/common/dlmalloc.c
+++ b/common/dlmalloc.c
@@ -1152,7 +1152,7 @@ struct malloc_chunk
   INTERNAL_SIZE_T size;      /* Size in bytes, including overhead. */
   struct malloc_chunk* fd;   /* double links -- used only if free. */
   struct malloc_chunk* bk;
-};
+} __attribute__((__may_alias__)) ;
 
 typedef struct malloc_chunk* mchunkptr;