diff --git a/dist-build/msys2-win64.sh b/dist-build/msys2-win64.sh
index a8a98174..b7b75d10 100755
--- a/dist-build/msys2-win64.sh
+++ b/dist-build/msys2-win64.sh
@@ -1,6 +1,6 @@
 #! /bin/sh
 
-export CFLAGS="-O3 -fomit-frame-pointer -m64 -march=pentium2 -mtune=nocona"
+export CFLAGS="-O3 -fomit-frame-pointer -m64 -mtune=nocona"
 export PREFIX="$(pwd)/libsodium-win64"
 
 ./configure --prefix="$PREFIX" --exec-prefix="$PREFIX" \