diff --git a/Source/Tools/CommonGUI/IMGui.h b/Source/Tools/CommonGUI/IMGui.h
index 4c7fee754..78a95c078 100644
--- a/Source/Tools/CommonGUI/IMGui.h
+++ b/Source/Tools/CommonGUI/IMGui.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 #pragma once
 
 #include <FEXCore/fextl/string.h>