#define CAAL(s, v) add_assoc_long_ex(return_value, s, sizeof(s) - 1, (long) v);
#define CAAD(s, v) add_assoc_double_ex(return_value, s, sizeof(s) - 1, (double) v);
#define CAAS(s, v) add_assoc_string_ex(return_value, s, sizeof(s) - 1, (char *) (v ? v : ""));
-#define CAASTR(s, v) add_assoc_str_ex(return_value, s, sizeof(s) - 1, v? v : "");
+#define CAASTR(s, v) add_assoc_str_ex(return_value, s, sizeof(s) - 1, v ? v : STR_EMPTY_ALLOC());
#define CAAZ(s, v) add_assoc_zval_ex(return_value, s, sizeof(s) -1 , (zval *) v);
#if defined(PHP_WIN32) || defined(__GNUC__)