diff --git a/Kernel/KBufferBuilder.h b/Kernel/KBufferBuilder.h
index 62e4ec7582..affef2bbe8 100644
--- a/Kernel/KBufferBuilder.h
+++ b/Kernel/KBufferBuilder.h
@@ -45,6 +45,14 @@ public:
     void appendf(const char*, ...);
     void appendvf(const char*, va_list);
 
+    template<typename... Parameters>
+    void appendff(StringView fmtstr, const Parameters&... parameters)
+    {
+        // FIXME: This is really not the way to go about it, but vformat expects a
+        //        StringBuilder. Why does this class exist anyways?
+        append(String::formatted(fmtstr, parameters...));
+    }
+
     KBuffer build();
 
 private: