diff --git a/Sources/HTMLDOMUtils.h b/Sources/HTMLDOMUtils.h
index 2b62d59..b792197 100644
--- a/Sources/HTMLDOMUtils.h
+++ b/Sources/HTMLDOMUtils.h
@@ -12,3 +12,4 @@
 @class HTMLNode;
 
 extern HTMLNode * GetCommonAncestorContainer(HTMLNode *nodeA, HTMLNode *nodeB);
+extern NSArray<HTMLNode *> * GetAncestorNodes(HTMLNode *node);
diff --git a/Sources/HTMLDOMUtils.m b/Sources/HTMLDOMUtils.m
index 45a95ef..efc2d82 100644
--- a/Sources/HTMLDOMUtils.m
+++ b/Sources/HTMLDOMUtils.m
@@ -21,3 +21,12 @@ extern HTMLNode * GetCommonAncestorContainer(HTMLNode *nodeA, HTMLNode *nodeB)
 
 	return nil;
 }
+
+extern NSArray<HTMLNode *> * GetAncestorNodes(HTMLNode *node)
+{
+	NSMutableArray *ancestors = [NSMutableArray array];
+	for (HTMLNode *it = node; it; it = it.parentNode) {
+		[ancestors addObject:it];
+	}
+	return ancestors;
+}
diff --git a/Sources/HTMLNode.m b/Sources/HTMLNode.m
index c2aecba..9ba3bd3 100644
--- a/Sources/HTMLNode.m
+++ b/Sources/HTMLNode.m
@@ -17,6 +17,7 @@
 #import "HTMLNodeFilter.h"
 #import "CSSSelector.h"
 #import "HTMLDocument+Private.h"
+#import "HTMLDOMUtils.h"
 
 @interface HTMLNode ()
 {
@@ -343,16 +344,9 @@
 		return HTMLDocumentPositionEquivalent;
 	}
 
-	NSArray * (^ ancestorNodes) (HTMLNode *) = ^ NSArray * (HTMLNode *node) {
-		NSMutableArray *ancestors = [NSMutableArray array];
-		for (HTMLNode *node = self; node; node = node.parentNode) {
-			[ancestors addObject:node];
-		}
-		return ancestors;
-	};
 
-	NSArray *ancestors1 = ancestorNodes(self);
-	NSArray *ancestors2 = ancestorNodes(otherNode);
+	NSArray *ancestors1 = GetAncestorNodes(self);
+	NSArray *ancestors2 = GetAncestorNodes(otherNode);
 
 	if (ancestors1.lastObject != ancestors2.lastObject) {
 		return HTMLDocumentPositionDisconnected |