+#if PSI_THREADED_PARSER
+zend_string *psi_string_init_interned(const char *buf, size_t len, int p);
+zend_string *psi_new_interned_string(zend_string *str);
+#else
+# define psi_string_init_interned zend_string_init_interned
+# define psi_new_interned_string zend_new_interned_string
+#endif
+