diff --git a/hw/xbox/mcpx/dsp/dsp.c b/hw/xbox/mcpx/dsp/dsp.c
index d1e3b2a9b3..a86d9f314b 100644
--- a/hw/xbox/mcpx/dsp/dsp.c
+++ b/hw/xbox/mcpx/dsp/dsp.c
@@ -2,6 +2,7 @@
  * MCPX DSP emulator
  *
  * Copyright (c) 2015 espes
+ * Copyright (c) 2020-2025 Matt Borgerson
  *
  * Adapted from Hatari DSP M56001 emulation
  * (C) 2001-2008 ARAnyM developer team
diff --git a/hw/xbox/mcpx/dsp/dsp_cpu.c b/hw/xbox/mcpx/dsp/dsp_cpu.c
index 874dd494ce..b31172fd60 100644
--- a/hw/xbox/mcpx/dsp/dsp_cpu.c
+++ b/hw/xbox/mcpx/dsp/dsp_cpu.c
@@ -2,6 +2,7 @@
  * DSP56300 emulator
  *
  * Copyright (c) 2015 espes
+ * Copyright (c) 2020-2025 Matt Borgerson
  *
  * Adapted from Hatari DSP M56001 emulation
  * (C) 2003-2008 ARAnyM developer team