diff --git a/mach/i386/as/mach0.c b/mach/i386/as/mach0.c
index c84a3d0ae..fba472ea5 100644
--- a/mach/i386/as/mach0.c
+++ b/mach/i386/as/mach0.c
@@ -13,3 +13,5 @@
 
 #undef valu_t
 #define valu_t long
+#undef addr_t
+#define addr_t long