diff --git a/hal/src/main/native/athena/simd/simd.h b/hal/src/main/native/athena/simd/simd.h
index af37100765d..11a781c60b6 100644
--- a/hal/src/main/native/athena/simd/simd.h
+++ b/hal/src/main/native/athena/simd/simd.h
@@ -2,6 +2,33 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
+// This file contains snippets from the Simd Library by Ihar Yermalayeu
+// (http://ermig1979.github.io/Simd). The original source file names are listed
+// above each section.
+/*
+ * Simd Library (http://ermig1979.github.io/Simd).
+ *
+ * Copyright (c) 2011-2024 Yermalayeu Ihar.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
 #pragma once
 
 #include <arm_neon.h>