diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index 4fa0471de..0e8e45fd2 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -14,7 +14,7 @@
 
 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
 
-extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
+extern const uint8_t MAC_BCAST_ADDR[6] ALIGN2; /* six all-ones */
 
 
 /*** DHCP packet ***/