diff --git a/ext/zip/php_zip.c b/ext/zip/php_zip.c
index 4ff362bab15d..7198fe99d31f 100644
--- a/ext/zip/php_zip.c
+++ b/ext/zip/php_zip.c
@@ -1463,11 +1463,7 @@ PHP_METHOD(ZipArchive, open)
 	}
 
 	/* open for write without option to empty the archive */
-#ifdef ZIP_RDONLY
 	if ((flags & (ZIP_TRUNCATE | ZIP_RDONLY)) == 0) {
-#else
-	if ((flags & ZIP_TRUNCATE) == 0) {
-#endif
 		zend_stat_t st = {0};
 
 		/* exists and is empty */
diff --git a/ext/zip/php_zip.stub.php b/ext/zip/php_zip.stub.php
index 8a37b2508da1..2f055e83d34d 100644
--- a/ext/zip/php_zip.stub.php
+++ b/ext/zip/php_zip.stub.php
@@ -82,12 +82,10 @@ class ZipArchive implements Countable
      * @cvalue ZIP_OVERWRITE
      */
     public const int OVERWRITE = UNKNOWN;
-#ifdef ZIP_RDONLY
     /**
      * @cvalue ZIP_RDONLY
      */
     public const int RDONLY = UNKNOWN;
-#endif
 
     /**
      * @cvalue ZIP_FL_NOCASE
diff --git a/ext/zip/php_zip_arginfo.h b/ext/zip/php_zip_arginfo.h
index 2c5191d6fbd0..f3d081daf04d 100644
--- a/ext/zip/php_zip_arginfo.h
+++ b/ext/zip/php_zip_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit php_zip.stub.php instead.
- * Stub hash: 1f77735273373672b9c8c5b92c46e23ea99faeaf */
+ * Stub hash: 030038017c7c76195c0b0dc2392696f458c2471f */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_zip_open, 0, 0, 1)
 	ZEND_ARG_TYPE_INFO(0, filename, IS_STRING, 0)
@@ -550,14 +550,12 @@ static zend_class_entry *register_class_ZipArchive(zend_class_entry *class_entry
 	zend_string *const_OVERWRITE_name = zend_string_init_interned("OVERWRITE", sizeof("OVERWRITE") - 1, true);
 	zend_declare_typed_class_constant(class_entry, const_OVERWRITE_name, &const_OVERWRITE_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
 	zend_string_release_ex(const_OVERWRITE_name, true);
-#if defined(ZIP_RDONLY)
 
 	zval const_RDONLY_value;
 	ZVAL_LONG(&const_RDONLY_value, ZIP_RDONLY);
 	zend_string *const_RDONLY_name = zend_string_init_interned("RDONLY", sizeof("RDONLY") - 1, true);
 	zend_declare_typed_class_constant(class_entry, const_RDONLY_name, &const_RDONLY_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
 	zend_string_release_ex(const_RDONLY_name, true);
-#endif
 
 	zval const_FL_NOCASE_value;
 	ZVAL_LONG(&const_FL_NOCASE_value, ZIP_FL_NOCASE);