diff --git a/gcc/system.h b/gcc/system.h
index a5cfaba..023ced4 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -783,7 +783,7 @@ extern void fancy_abort (const char *, int, const
char *) ATTRIBUTE_NORETURN;
   LANG_HOOKS_MISSING_ARGUMENT

 /* Miscellaneous macros that are no longer used.  */
- #pragma GCC poison USE_MAPPED_LOCATION
+ #pragma GCC poison USE_MAPPED_LOCATION UNITS_PER_SIMD_WORD

 /* Libiberty macros that are no longer used in GCC.  */