diff --git a/casa/Utilities.h b/casa/Utilities.h
index e33f69a552f..b30cfe3f904 100644
--- a/casa/Utilities.h
+++ b/casa/Utilities.h
@@ -43,9 +43,7 @@
 #include <casacore/casa/Utilities/GenSort.h>
 #include <casacore/casa/Utilities/Notice.h>
 #include <casacore/casa/Utilities/PtrHolder.h>
-#include <casacore/casa/Utilities/RegSequence.h>
 #include <casacore/casa/Utilities/Regex.h>
-#include <casacore/casa/Utilities/Register.h>
 #include <casacore/casa/Utilities/Sequence.h>
 #include <casacore/casa/Utilities/Sort.h>
 #include <casacore/casa/Utilities/SortError.h>
@@ -125,9 +123,7 @@ namespace casacore { //# NAMESPACE CASACORE - BEGIN
 //    of any datatype can be derived from the base class
 //    <linkto class=Sequence>Sequence</linkto>.
 //    One example is <linkto class=uIntSequence>uIntSequence</linkto>,
-//    provided for general use. Another is
-//    <linkto class=RegSequence>RegSequence</linkto>, exclusively used
-//    by the <linkto group="Register.h#register">Register</linkto> function.
+//    provided for general use. 
 //   <li> <linkto class=String>Strings</linkto>.
 //    for the C++ preprocessor
 //  </ul>
diff --git a/casa/Utilities/Sequence2.cc b/casa/Utilities/Sequence2.cc
index 7cad85b8e5e..88c5fd35dd8 100644
--- a/casa/Utilities/Sequence2.cc
+++ b/casa/Utilities/Sequence2.cc
@@ -30,7 +30,7 @@
 namespace casacore { //# NAMESPACE CASACORE - BEGIN
 
 #if defined(USE_THREADS)
-std::atomic<uInt> uIntSequence::next(1); // start at 1 to stay in sync with RegSequence
+std::atomic<uInt> uIntSequence::next(1); // start at 1 to stay in sync with RegSequence, FIXME fix comment, RegSequnce no longer exists
 #else
 uInt uIntSequence::next = 1;
 #endif