diff --git a/configure.ac b/configure.ac
index 4d40ac9..a7f92c8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,6 +5,7 @@ AC_INIT([lua], [0.5.2b], [xsang.le@gmail.com])
 # [subdir-objects] if needed
 AM_INIT_AUTOMAKE([subdir-objects])
 
+: ${CFLAGS="-g -O0"}
 # dependencies
 # C compiler
 AC_PROG_CC
diff --git a/dist/lua-0.5.2b.tar.gz b/dist/lua-0.5.2b.tar.gz
index b2e3004..37c6f20 100644
Binary files a/dist/lua-0.5.2b.tar.gz and b/dist/lua-0.5.2b.tar.gz differ