diff --git a/Makefile.arm64 b/Makefile.arm64
index 7e9df2f4b..d19e796a5 100644
--- a/Makefile.arm64
+++ b/Makefile.arm64
@@ -20,6 +20,6 @@ FCOMMON_OPT += -mtune=thunderx -mcpu=thunderx
 endif
 
 ifeq ($(CORE), THUNDERX2T99)
-CCOMMON_OPT += -mtune=vulcan -mcpu=vulcan
-FCOMMON_OPT += -mtune=vulcan -mcpu=vulcan
+CCOMMON_OPT += -mtune=thunderx2t99 -mcpu=thunderx2t99
+FCOMMON_OPT += -mtune=thunderx2t99 -mcpu=thunderx2t99
 endif