diff --git a/etc/astronaut.conf b/etc/astronaut.conf
index 0863edd..212a31a 100644
--- a/etc/astronaut.conf
+++ b/etc/astronaut.conf
@@ -23,7 +23,7 @@ package_options() {
     esac
 }
 
-export CFLAGS='-mtune=atom -pipe -O3'
+export CFLAGS='-march=native -pipe -O3'
 export CXXFLAGS="$CFLAGS"
 export MAKEFLAGS="${MAKEFLAGS:--j $(grep processor /proc/cpuinfo | wc -l)}"
 export WAFFLAGS="$MAKEFLAGS"