diff --git a/ext/dom/nodelist.c b/ext/dom/nodelist.c
index 49fb0b79d8e..d2856577dde 100644
--- a/ext/dom/nodelist.c
+++ b/ext/dom/nodelist.c
@@ -50,7 +50,7 @@ static zend_always_inline void reset_objmap_cache(dom_nnodemap_object *objmap)
 	objmap->cached_length = -1;
 }
 
-int php_dom_get_nodelist_length(dom_object *obj)
+zend_long php_dom_get_nodelist_length(dom_object *obj)
 {
 	dom_nnodemap_object *objmap = (dom_nnodemap_object *) obj->ptr;
 	if (!objmap) {
diff --git a/ext/dom/nodelist.h b/ext/dom/nodelist.h
index 72264d683f3..e4a2f41e721 100644
--- a/ext/dom/nodelist.h
+++ b/ext/dom/nodelist.h
@@ -32,7 +32,7 @@ typedef struct _dom_nodelist_dimension_index {
 } dom_nodelist_dimension_index;
 
 void php_dom_nodelist_get_item_into_zval(dom_nnodemap_object *objmap, zend_long index, zval *return_value);
-int php_dom_get_nodelist_length(dom_object *obj);
+zend_long php_dom_get_nodelist_length(dom_object *obj);
 dom_nodelist_dimension_index dom_modern_nodelist_get_index(const zval *offset);
 zval *dom_modern_nodelist_read_dimension(zend_object *object, zval *offset, int type, zval *rv);
 int dom_modern_nodelist_has_dimension(zend_object *object, zval *member, int check_empty);