diff --git a/sdk/lib/crt/stdlib/_invalid_parameter_nt.c b/sdk/lib/crt/stdlib/_invalid_parameter_nt.c
new file mode 100644
index 00000000000..bf8fc7b5143
--- /dev/null
+++ b/sdk/lib/crt/stdlib/_invalid_parameter_nt.c
@@ -0,0 +1,25 @@
+/*
+ * PROJECT:     ReactOS NT CRT library
+ * LICENSE:     MIT (https://spdx.org/licenses/MIT)
+ * PURPOSE:     Implementation of _invalid_parameter
+ * COPYRIGHT:   Copyright 2025 Timo Kreuzer <timo.kreuzer@reactos.org>
+ */
+
+#include <stdlib.h>
+#include <ndk/rtlfuncs.h>
+
+void
+__cdecl
+_invalid_parameter(
+    _In_opt_z_ wchar_t const* expression,
+    _In_opt_z_ wchar_t const* function_name,
+    _In_opt_z_ wchar_t const* file_name,
+    _In_ unsigned int line_number,
+    _In_ uintptr_t reserved)
+{
+    DbgPrint("%ws:%u: Invalid parameter ('%ws') passed to C runtime function %ws.\n",
+             file_name,
+             line_number,
+             expression,
+             function_name);
+}
diff --git a/sdk/lib/crt/stdlib/stdlib.cmake b/sdk/lib/crt/stdlib/stdlib.cmake
index 4719ec21a39..8b9826d1d66 100644
--- a/sdk/lib/crt/stdlib/stdlib.cmake
+++ b/sdk/lib/crt/stdlib/stdlib.cmake
@@ -5,6 +5,7 @@ list(APPEND COMMON_STDLIB_SOURCE
 
 list(APPEND LIBCNTPR_STDLIB_SOURCE
     ${COMMON_STDLIB_SOURCE}
+    stdlib/_invalid_parameter_nt.c
     stdlib/rand_nt.c
 )