diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index 3b23884583dcb..ee111d4e7c49c 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -150,6 +150,8 @@ PHP 8.4 INTERNALS UPGRADE NOTES
      value instead.
    - Removed DOM_XMLNS_NAMESPACE from xml_common.h. Use DOM_XMLNS_NS_URI
      from namespace_compat.h instead.
+   - Added php_dom_get_ns_mapper(), php_dom_next_in_tree_order(),
+     php_dom_follow_spec_doc_ref(), and php_dom_follow_spec_doc_ref().
 
  b. ext/random
    - The macro RAND_RANGE_BADSCALING() has been removed. The implementation
diff --git a/ext/dom/php_dom.h b/ext/dom/php_dom.h
index 503c70b11131f..1b214d1154467 100644
--- a/ext/dom/php_dom.h
+++ b/ext/dom/php_dom.h
@@ -114,9 +114,6 @@ typedef enum _dom_iterator_type {
 	DOM_HTMLCOLLECTION,
 } dom_iterator_type;
 
-struct _php_dom_libxml_ns_mapper;
-typedef struct _php_dom_libxml_ns_mapper php_dom_libxml_ns_mapper;
-
 static inline dom_object_namespace_node *php_dom_namespace_node_obj_from_obj(zend_object *obj) {
 	return (dom_object_namespace_node*)((char*)(obj) - XtOffsetOf(dom_object_namespace_node, dom.std));
 }
@@ -178,27 +175,6 @@ void dom_document_convert_to_modern(php_libxml_ref_obj *document, xmlDocPtr lxml
 dom_object *php_dom_instantiate_object_helper(zval *return_value, zend_class_entry *ce, xmlNodePtr obj, dom_object *parent);
 xmlDocPtr php_dom_create_html_doc(void);
 
-static zend_always_inline xmlNodePtr php_dom_next_in_tree_order(const xmlNode *nodep, const xmlNode *basep)
-{
-	if (nodep->next) {
-		return nodep->next;
-	} else {
-		/* Go upwards, until we find a parent node with a next sibling, or until we hit the base. */
-		do {
-			nodep = nodep->parent;
-			if (nodep == basep) {
-				return NULL;
-			}
-			/* This shouldn't happen, unless there's an invalidation bug somewhere. */
-			if (UNEXPECTED(nodep == NULL)) {
-				zend_throw_error(NULL, "Current node in traversal is not in the document. Please report this as a bug in php-src.");
-				return NULL;
-			}
-		} while (nodep->next == NULL);
-		return nodep->next;
-	}
-}
-
 typedef enum {
 	DOM_LOAD_STRING = 0,
 	DOM_LOAD_FILE = 1,
@@ -287,17 +263,6 @@ static zend_always_inline void php_dom_mark_cache_tag_up_to_date_from_node(php_l
 	}
 }
 
-static zend_always_inline bool php_dom_follow_spec_doc_ref(const php_libxml_ref_obj *document)
-{
-	return document != NULL && document->class_type == PHP_LIBXML_CLASS_MODERN;
-}
-
-static zend_always_inline bool php_dom_follow_spec_intern(const dom_object *intern)
-{
-	ZEND_ASSERT(intern != NULL);
-	return php_dom_follow_spec_doc_ref(intern->document);
-}
-
 static zend_always_inline bool php_dom_follow_spec_node(const xmlNode *node)
 {
 	ZEND_ASSERT(node != NULL);
@@ -311,12 +276,6 @@ static zend_always_inline bool php_dom_follow_spec_node(const xmlNode *node)
 	return false;
 }
 
-static zend_always_inline php_dom_libxml_ns_mapper *php_dom_get_ns_mapper(dom_object *intern)
-{
-	ZEND_ASSERT(intern->document != NULL);
-	return (php_dom_libxml_ns_mapper *) intern->document->private_data;
-}
-
 PHP_MINIT_FUNCTION(dom);
 PHP_MSHUTDOWN_FUNCTION(dom);
 PHP_MINFO_FUNCTION(dom);
diff --git a/ext/dom/xml_common.h b/ext/dom/xml_common.h
index e93767ebc8442..2c9e1f9e413fd 100644
--- a/ext/dom/xml_common.h
+++ b/ext/dom/xml_common.h
@@ -80,4 +80,45 @@ PHP_DOM_EXPORT xmlNodePtr dom_object_get_node(dom_object *obj);
 	__id = ZEND_THIS; \
 	DOM_GET_OBJ(__ptr, __id, __prtype, __intern);
 
+struct _php_dom_libxml_ns_mapper;
+typedef struct _php_dom_libxml_ns_mapper php_dom_libxml_ns_mapper;
+
+static zend_always_inline php_dom_libxml_ns_mapper *php_dom_get_ns_mapper(dom_object *intern)
+{
+	ZEND_ASSERT(intern->document != NULL);
+	return (php_dom_libxml_ns_mapper *) intern->document->private_data;
+}
+
+static zend_always_inline xmlNodePtr php_dom_next_in_tree_order(const xmlNode *nodep, const xmlNode *basep)
+{
+	if (nodep->next) {
+		return nodep->next;
+	} else {
+		/* Go upwards, until we find a parent node with a next sibling, or until we hit the base. */
+		do {
+			nodep = nodep->parent;
+			if (nodep == basep) {
+				return NULL;
+			}
+			/* This shouldn't happen, unless there's an invalidation bug somewhere. */
+			if (UNEXPECTED(nodep == NULL)) {
+				zend_throw_error(NULL, "Current node in traversal is not in the document. Please report this as a bug in php-src.");
+				return NULL;
+			}
+		} while (nodep->next == NULL);
+		return nodep->next;
+	}
+}
+
+static zend_always_inline bool php_dom_follow_spec_doc_ref(const php_libxml_ref_obj *document)
+{
+	return document != NULL && document->class_type == PHP_LIBXML_CLASS_MODERN;
+}
+
+static zend_always_inline bool php_dom_follow_spec_intern(const dom_object *intern)
+{
+	ZEND_ASSERT(intern != NULL);
+	return php_dom_follow_spec_doc_ref(intern->document);
+}
+
 #endif
diff --git a/ext/xsl/xsltprocessor.c b/ext/xsl/xsltprocessor.c
index e7a04e673a25c..aa5fbcd0a630a 100644
--- a/ext/xsl/xsltprocessor.c
+++ b/ext/xsl/xsltprocessor.c
@@ -23,7 +23,6 @@
 #include "php_xsl.h"
 #include <libxslt/variables.h>
 #include "ext/libxml/php_libxml.h"
-#include "ext/dom/php_dom.h"
 #include "ext/dom/namespace_compat.h"