diff -urN lua-5.1.4-orig/src/luaconf.h lua-5.1.4/src/luaconf.h
--- lua-5.1.4-orig/src/luaconf.h	2008-02-12 01:25:08 +0900
+++ lua-5.1.4/src/luaconf.h	2010-06-14 03:58:23 +0900
@@ -592,7 +592,7 @@
 ** aligned in 16-byte boundaries, then you should add long double in the
 ** union.) Probably you do not need to change this.
 */
-#define LUAI_USER_ALIGNMENT_T	union { double u; void *s; long l; }
+#define LUAI_USER_ALIGNMENT_T	union { float u; void *s; long l; }
 
 
 /*