diff --git a/PKGBUILD b/PKGBUILD
index 633bb14..2b7028c 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -63,6 +63,8 @@ build(){
     _gccarch='-m64'
     if [ "${CARCH}" == "aarch64" ]; then
         _gccarch='-march=armv8-a+crypto'
+    elif [[ "${CARCH}" =~ ^x86_64(|_v[0-9]+)$ ]]; then
+        _gccarch="-march=${CARCH//_/-}"
     fi
 
     # for attach debugger