diff --git a/configure.in b/configure.in
index 457c62fd7..faad1558d 100644
--- a/configure.in
+++ b/configure.in
@@ -86,7 +86,7 @@ if test x$enable_debug != xyes; then
     case "$target" in
         i486-*-*)
             if test x$ac_cv_prog_gcc = xyes; then
-                CFLAGS="$CFLAGS -march=486"
+                CFLAGS="$CFLAGS -march=i486"
             fi
             ;;
         i?86-*-*)