diff --git a/NEWS b/NEWS
index da8d58e4dc7..1ffcaa8b061 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-20085 (Assertion failure when combining lazy object
     get_properties exception with foreach loop). (nielsdos)
 
+- DOM:
+  . Partially fixed bug GH-16317 (DOM classes do not allow
+    __debugInfo() overrides to work). (nielsdos)
+
 - FPM:
   . Fixed bug GH-19974 (fpm_status_export_to_zval segfault for parallel
     execution). (Jakub Zelenka, txuna)
diff --git a/ext/dom/php_dom.c b/ext/dom/php_dom.c
index 2438a081351..bcdd996f28e 100644
--- a/ext/dom/php_dom.c
+++ b/ext/dom/php_dom.c
@@ -492,6 +492,7 @@ static void dom_unset_property(zend_object *object, zend_string *member, void **
 	zend_std_unset_property(object, member, cache_slot);
 }
 
+/* This custom handler is necessary to avoid a recursive construction of the entire subtree. */
 static HashTable* dom_get_debug_info_helper(zend_object *object, int *is_temp) /* {{{ */
 {
 	dom_object			*obj = php_dom_obj_from_obj(object);
@@ -502,6 +503,11 @@ static HashTable* dom_get_debug_info_helper(zend_object *object, int *is_temp) /
 	dom_prop_handler	*entry;
 	zend_string         *object_str;
 
+	/* As we have a custom implementation, we must manually check for overrides. */
+	if (object->ce->__debugInfo) {
+		return zend_std_get_debug_info(object, is_temp);
+	}
+
 	*is_temp = 1;
 
 	std_props = zend_std_get_properties(object);
diff --git a/ext/dom/tests/gh16317.phpt b/ext/dom/tests/gh16317.phpt
new file mode 100644
index 00000000000..870c337716f
--- /dev/null
+++ b/ext/dom/tests/gh16317.phpt
@@ -0,0 +1,20 @@
+--TEST--
+GH-16317 (DOM classes do not allow __debugInfo() overrides to work)
+--FILE--
+<?php
+
+class Demo extends DOMNode {
+    public function __construct() {}
+    public function __debugInfo(): array {
+        return ['x' => 'y'];
+    }
+}
+
+var_dump(new Demo());
+
+?>
+--EXPECT--
+object(Demo)#1 (1) {
+  ["x"]=>
+  string(1) "y"
+}