diff --git a/vips.c b/vips.c
index ae5a8e5..813345d 100644
--- a/vips.c
+++ b/vips.c
@@ -24,6 +24,42 @@
 ZEND_DECLARE_MODULE_GLOBALS(vips)
 */
 
+/* backward compat macros */
+
+#ifndef IS_VOID
+# define IS_VOID 0
+#endif /* !defined(IS_VOID) */
+
+#ifndef IS_MIXED
+# define IS_MIXED 0
+#endif /* !defined(IS_MIXED) */
+
+#ifndef ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX
+# define ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(name, return_reference, num_args, type) \
+  ZEND_BEGIN_ARG_INFO_EX(name, 0, return_reference, num_args)
+#endif /* !defined(ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX) */
+
+#ifndef ZEND_ARG_TYPE_MASK
+# define ZEND_ARG_TYPE_MASK(pass_by_ref, name, type_mask, default_value) \
+  ZEND_ARG_TYPE_INFO(pass_by_ref, name, 0, 0)
+#endif /* !defined(ZEND_ARG_TYPE_MASK) */
+
+#ifndef ZEND_ARG_VARIADIC_TYPE_INFO
+# define ZEND_ARG_VARIADIC_TYPE_INFO(pass_by_ref, name, type_hint, allow_null) { #name, NULL, type_hint, pass_by_ref, allow_null, 1 },
+#endif /* !defined(ZEND_ARG_VARIADIC_TYPE_INFO) */
+
+#ifndef ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE
+# define ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(pass_by_ref, name, type_hint, allow_null, default_value) \
+  ZEND_ARG_TYPE_INFO(pass_by_ref, name, type_hint, allow_null)
+#endif /* !defined(ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE) */
+
+#if PHP_VERSION_ID < 70200
+# undef ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX
+# define ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(name, return_reference, required_num_args, class_name, allow_null) \
+  static const zend_internal_arg_info name[] = { \
+    { (const char*)(zend_uintptr_t)(required_num_args), ( #class_name ), 0, return_reference, allow_null, 0 },
+#endif /* PHP_VERSION_ID < 70200 */
+
 #include "vips_arginfo.h"
 
 /* True global resources - no need for thread safety here */