diff --git a/AK/IPv4Address.h b/AK/IPv4Address.h
index cc03c9ffede..68ac1030ee6 100644
--- a/AK/IPv4Address.h
+++ b/AK/IPv4Address.h
@@ -86,7 +86,7 @@ public:
             a = 0;
             b = 0;
             c = 0;
-            d = parts[1].to_uint().value_or(256);
+            d = parts[0].to_uint().value_or(256);
         } else if (parts.size() == 2) {
             a = parts[0].to_uint().value_or(256);
             b = 0;