1 files changed, 4 insertions, 0 deletions

diff --git a/c-api/compat-5.3.c b/c-api/compat-5.3.c
index 9edd5f1..ecb22b0 100644
--- a/c-api/compat-5.3.c
+++ b/c-api/compat-5.3.c
@@ -362,6 +362,10 @@ COMPAT53_API void lua_seti (lua_State *L, int index, lua_Integer i) {
 }
 
 
+#if !defined(lua_str2number)
+#  define lua_str2number(s, p)  strtod(s, p)
+#endif
+
 COMPAT53_API size_t lua_stringtonumber (lua_State *L, const char *s) {
   char* endptr;
   lua_Number n = lua_str2number(s, &endptr);