--- src/luaconf.h
+++ src/luaconf.h
@@ -501,13 +501,13 @@
 */
 
 #define LUA_NUMBER_DOUBLE
-#define LUA_NUMBER	double
+#define LUA_NUMBER	float
 
 /*
 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
 @* over a number.
 */
-#define LUAI_UACNUMBER	double
+#define LUAI_UACNUMBER	float
 
 
 /*
@@ -518,7 +518,7 @@
 @@ lua_str2number converts a string to a number.
 */
-#define LUA_NUMBER_SCAN		"%lf"
+#define LUA_NUMBER_SCAN		"%f"
-#define LUA_NUMBER_FMT		"%.14g"
+#define LUA_NUMBER_FMT		"%.8f"
 #define lua_number2str(s,n)	sprintf((s), LUA_NUMBER_FMT, (n))
 #define LUAI_MAXNUMBER2STR	32 /* 16 digits, sign, point, and \0 */
 #define lua_str2number(s,p)	strtod((s), (p))