diff --git a/AK/Format.h b/AK/Format.h
index 2d0768e358..cc93afad39 100644
--- a/AK/Format.h
+++ b/AK/Format.h
@@ -557,6 +557,9 @@ struct Formatter<nullptr_t> : Formatter<FlatPtr> {
 
 ErrorOr<void> vformat(StringBuilder&, StringView fmtstr, TypeErasedFormatParams&);
 
+void vdbg(StringView fmtstr, TypeErasedFormatParams&, bool newline = false);
+void dbgln();
+
 #ifndef KERNEL
 void vout(FILE*, StringView fmtstr, TypeErasedFormatParams&, bool newline = false);
 
@@ -593,13 +596,30 @@ inline void outln() { outln(stdout); }
 template<typename... Parameters>
 void warn(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
 {
+#    ifdef AK_OS_SERENITY
+    VariadicFormatParams<AllowDebugOnlyFormatters::Yes, Parameters...> variadic_format_params { parameters... };
+    vdbg(fmtstr.view(), variadic_format_params, false);
+#    endif
     out(stderr, move(fmtstr), parameters...);
 }
 
 template<typename... Parameters>
-void warnln(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters) { outln(stderr, move(fmtstr), parameters...); }
+void warnln(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
+{
+#    ifdef AK_OS_SERENITY
+    VariadicFormatParams<AllowDebugOnlyFormatters::Yes, Parameters...> variadic_format_params { parameters... };
+    vdbg(fmtstr.view(), variadic_format_params, true);
+#    endif
+    outln(stderr, move(fmtstr), parameters...);
+}
 
-inline void warnln() { outln(stderr); }
+inline void warnln()
+{
+#    ifdef AK_OS_SERENITY
+    dbgln();
+#    endif
+    outln(stderr);
+}
 
 #    define warnln_if(flag, fmt, ...)       \
         do {                                \
@@ -609,8 +629,6 @@ inline void warnln() { outln(stderr); }
 
 #endif
 
-void vdbg(StringView fmtstr, TypeErasedFormatParams&, bool newline = false);
-
 template<typename... Parameters>
 void dbg(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
 {