diff --git a/Makefile.arm64 b/Makefile.arm64
index 1091edfe5..78ba79aa0 100644
--- a/Makefile.arm64
+++ b/Makefile.arm64
@@ -66,6 +66,11 @@ FCOMMON_OPT += -march=armv8.1-a -mtune=thunderx2t99
 endif
 endif
 
+ifeq ($(CORE), SILICON)
+CCOMMON_OPT += -march=armv8.3-a
+FCOMMON_OPT += -march=armv8.3-a
+endif
+
 ifeq ($(GCCVERSIONGTEQ9), 1)
 ifeq ($(CORE), TSV110)
 CCOMMON_OPT += -march=armv8.2-a -mtune=tsv110