diff --git a/configure b/configure
index f54415d..3de4ea7 100755
--- a/configure
+++ b/configure
@@ -2810,7 +2810,7 @@ int main(int argc, char **argv)
 }
 EOF
   if ! compile_prog "" "" ; then
-    CFLAGS="-march=i486 $CFLAGS"
+    QEMU_CFLAGS="-march=i486 $QEMU_CFLAGS"
   fi
 fi