diff --git a/ChangeLog b/ChangeLog
index 694af2a..5be027a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2001-12-31  Richard Kreckel  <kreckel@ginac.de>
+
+        * src/base/digitseq/cl_DS.h: <gmp.h> is not included extern "C"
+          any more since GMP4 has some C++ support in it.
+
 2001-12-14  Richard Kreckel  <kreckel@ginac.de>
 
         * include/cln/modules.h, include/cln/object.h: add support for
diff --git a/src/base/digitseq/cl_DS.h b/src/base/digitseq/cl_DS.h
index 61dd161..ba7fb31 100644
--- a/src/base/digitseq/cl_DS.h
+++ b/src/base/digitseq/cl_DS.h
@@ -351,9 +351,11 @@ extern void shiftxor_loop_up (uintD* xptr, const uintD* yptr, uintC count, uintC
 // Supersede the functions by wrappers around calls to gmp mpn,
 // for those functions where gmp is believed to be faster.
 
-extern "C" {
+}  // namespace cln
+
 #include <gmp.h>
-}
+
+namespace cln {
 
 #if 0 // not worth it, since gmp's mpn_cmp is not optimized
 inline cl_signean compare_loop_down (const uintD* xptr, const uintD* yptr, uintC count)