diff --git a/src/diff/children.js b/src/diff/children.js
index b8fb89cc40..ea317fbb87 100644
--- a/src/diff/children.js
+++ b/src/diff/children.js
@@ -325,13 +325,12 @@ function placeChild(
 	if (nextDom !== undefined) {
 		oldDom = nextDom;
 	} else {
-		oldDom = newDom.nextSibling;
-	}
-
-	// Skip over comment nodes. Will be removed right after calling diffChildren
-	// in diff so that the vnode tree matches the DOM tree again.
-	while (oldDom !== null && oldDom.nodeType === 8) {
-		oldDom = oldDom.nextSibling;
+		oldDom = newDom;
+		// Skip over comment nodes. Will be removed right after calling diffChildren
+		// in diff so that the vnode tree matches the DOM tree again.
+		do {
+			oldDom = oldDom.nextSibling;
+		} while (oldDom !== null && oldDom.nodeType === 8);
 	}
 
 	return oldDom;