diff --git a/Makefile.in b/legacy/Makefile.in
similarity index 100%
rename from Makefile.in
rename to legacy/Makefile.in
diff --git a/configure.ac b/legacy/configure.ac
similarity index 100%
rename from configure.ac
rename to legacy/configure.ac
diff --git a/meson.build b/meson.build
index 498648a5..b1201655 100644
--- a/meson.build
+++ b/meson.build
@@ -22,6 +22,7 @@ project(
 	['c'],
 	version: '5.5.0',
 	license: 'GPL-3.0-or-later',
+  default_options : [ 'buildtype=release' ]
 )
 
 project_description = 'TN3270 client library'