diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 06e2225e..55735729 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -26,6 +26,7 @@ The full set of tests is only run for tagged releases.
 - sys_w11_n4: reduce cache from 64 to 32 kB to keep timing closure
 - stay with vivado 2017.2 as default tool, 2017.2 to 2018.2 exhibit much
   longer build times for w11 designs (see Xilinx Forum post [884858](https://forums.xilinx.com/t5/Synthesis/vivado-2018-2-much-slower-than-2017-2-at-least-for-small-designs/m-p/884858))
+- RtclRw11Unit: fix for clang: M_virt() now public
 
 <!-- --------------------------------------------------------------------- -->
 ---
diff --git a/tools/src/librwxxtpp/RtclRw11Unit.hpp b/tools/src/librwxxtpp/RtclRw11Unit.hpp
index 84e13b37..bb841dbe 100644
--- a/tools/src/librwxxtpp/RtclRw11Unit.hpp
+++ b/tools/src/librwxxtpp/RtclRw11Unit.hpp
@@ -1,6 +1,6 @@
-// $Id: RtclRw11Unit.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RtclRw11Unit.hpp 1046 2018-09-15 16:20:23Z mueller $
 //
-// Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
+// Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
 // This program is free software; you may redistribute and/or modify it under
 // the terms of the GNU General Public License as published by the Free
@@ -13,6 +13,7 @@
 // 
 // Revision History: 
 // Date         Rev Version  Comment
+// 2018-09-15  1046   1.2.1  fix for clang: M_virt() now public
 // 2017-04-08   870   1.2    drop fpCpu, use added Cpu()=0 instead
 // 2017-04-02   863   1.1    add fpVirt,DetachCleanup(),AttachDone(),M_virt()
 // 2013-03-03   494   1.0    Initial version
@@ -60,9 +61,10 @@ namespace Retro {
       int           M_set(RtclArgs& args);
       int           M_attach(RtclArgs& args);
       int           M_detach(RtclArgs& args);
-      int           M_virt(RtclArgs& args);
       int           M_dump(RtclArgs& args);
       int           M_default(RtclArgs& args);
+    public:
+      int           M_virt(RtclArgs& args);
 
     protected:
       RtclGetList   fGets;