diff --git a/desktop/ctwm/ctwm.SlackBuild b/desktop/ctwm/ctwm.SlackBuild
index 0231d029a0..361ea5743c 100644
--- a/desktop/ctwm/ctwm.SlackBuild
+++ b/desktop/ctwm/ctwm.SlackBuild
@@ -23,6 +23,7 @@
 #  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# 20230819 bkw: update for v4.1.0.
 # 20191130 bkw: update for v4.0.3.
 
 # 20180914 bkw:
@@ -35,7 +36,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=ctwm
-VERSION=${VERSION:-4.0.3}
+VERSION=${VERSION:-4.1.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
@@ -59,16 +60,12 @@ OUTPUT=${OUTPUT:-/tmp}
 
 if [ "$ARCH" = "i586" ]; then
   SLKCFLAGS="-O2 -march=i586 -mtune=i686"
-  LIBDIRSUFFIX=""
 elif [ "$ARCH" = "i686" ]; then
   SLKCFLAGS="-O2 -march=i686 -mtune=i686"
-  LIBDIRSUFFIX=""
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
-  LIBDIRSUFFIX="64"
 else
   SLKCFLAGS="-O2"
-  LIBDIRSUFFIX=""
 fi
 
 set -e
@@ -80,8 +77,8 @@ rm -rf $PRGNAM-$VERSION
 tar xvf $CWD/$PRGNAM-$VERSION.tar.xz
 cd $PRGNAM-$VERSION
 chown -R root:root .
-find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
-        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+
+find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} + -o \
+        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} +
 
 mkdir -p build
 cd build
diff --git a/desktop/ctwm/ctwm.info b/desktop/ctwm/ctwm.info
index f5284f5698..d6897e97c5 100644
--- a/desktop/ctwm/ctwm.info
+++ b/desktop/ctwm/ctwm.info
@@ -1,8 +1,8 @@
 PRGNAM="ctwm"
-VERSION="4.0.3"
+VERSION="4.1.0"
 HOMEPAGE="https://www.ctwm.org"
-DOWNLOAD="https://www.ctwm.org/dist/ctwm-4.0.3.tar.xz"
-MD5SUM="545baf676d93250fe2ab8399dd355b72"
+DOWNLOAD="https://www.ctwm.org/dist/ctwm-4.1.0.tar.xz"
+MD5SUM="3492ac3ff5771dd3d0a5fef9cacbe35f"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES=""