diff --git a/ChangeLog b/ChangeLog
index 35f13ca..c4ce8e0 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,8 +1,15 @@
 2020-08-20
 
+        * Version 1.8.0 released
+        ========================
+
+
+2020-08-21
+
         * Bug fix version 1.7.1 released
         ================================
 
+        Test for Big Sur in configuration step (#3326)
         Copy Python module into pyext/ctools folder (#3322)
         Add units to reference manual of response cube tools (#3321)
         Speed-up ctbin for stacked event binning (#3275)
diff --git a/NEWS b/NEWS
index ce314c9..b676da4 100755
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,6 @@
 New Features and Important Changes in ctools 1.7.1
 
-20 August 2020
+21 August 2020
 
 
 Introduction
@@ -11,9 +11,7 @@ ctools release with respect to the precedent release.
 
 Configuration
 -------------
-The Python module is now copied from pyext/build/ctools/ctools into
-pyext/ctools since code generated using recent swig versions needs the module
-in that place (#3322).
+None
 
 
 Documentation
@@ -23,7 +21,12 @@ The units of the response cubes were added to the reference manual (#3321).
 
 Python interface
 ----------------
-None
+The configuration now checks for Big Sur and later so that the path names in
+the Python modules are adapted as needed (#3326).
+
+The Python module is now copied from pyext/build/ctools/ctools into
+pyext/ctools since code generated using recent swig versions needs the module
+in that place (#3322).
 
 
 Support model
diff --git a/configure.ac b/configure.ac
index 1c3cc93..34fad18 100755
--- a/configure.ac
+++ b/configure.ac
@@ -134,6 +134,9 @@ if test `uname -s` = "Darwin"; then
   if [ test $version -ge 1011 ]; then
     osx_el_capitan=yes
   fi
+  if [ test $version -ge 110 ]; then
+    osx_el_capitan=yes
+  fi
 fi
 AC_MSG_CHECKING([for Mac OS X >= 10.7])
 if [test "x$osx_lion" = "xyes"]; then
diff --git a/doc/source/admin/release_history/1.7.1.rst b/doc/source/admin/release_history/1.7.1.rst
index 2b335ba..fc24fa1 100644
--- a/doc/source/admin/release_history/1.7.1.rst
+++ b/doc/source/admin/release_history/1.7.1.rst
@@ -1,6 +1,6 @@
 .. _1.7.1:
 
-ctools 1.7.1 release (20 August 2020)
+ctools 1.7.1 release (21 August 2020)
 =====================================
 
 Overview
@@ -10,6 +10,8 @@ ctools 1.7.1 is a bug fix release for ctools release 1.7.
 
 The following bugs were fixed:
 
+* [`3326 <https://cta-redmine.irap.omp.eu/issues/3326>`_] -
+  Test for Big Sur in configuration step
 * [`3322 <https://cta-redmine.irap.omp.eu/issues/3322>`_] -
   Copy Python module into pyext/ctools folder
 * [`3321 <https://cta-redmine.irap.omp.eu/issues/3321>`_] -