diff --git a/src/lib/formats/tzx_cas.cpp b/src/lib/formats/tzx_cas.cpp
index 7f03be7977a..d950419361e 100644
--- a/src/lib/formats/tzx_cas.cpp
+++ b/src/lib/formats/tzx_cas.cpp
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:Wilbert Pol,???
+// copyright-holders:Wilbert Pol
 /*
 
 TZX (currently spectrum only) and spectrum TAP cassette format support by Wilbert Pol
diff --git a/src/lib/formats/tzx_cas.h b/src/lib/formats/tzx_cas.h
index 2db31245310..0041d9383d8 100644
--- a/src/lib/formats/tzx_cas.h
+++ b/src/lib/formats/tzx_cas.h
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:Wilbert Pol,???
+// copyright-holders:Wilbert Pol
 /*
 
        tzx_cas.h