diff --git a/contrib/dopostingstats.sh b/contrib/dopostingstats.sh
index c0e5e8c..61ffd53 100644
--- a/contrib/dopostingstats.sh
+++ b/contrib/dopostingstats.sh
@@ -1,10 +1,13 @@
 #!/bin/bash
 # installation path is /srv/newsstats/, please adjust accordingly
-if [[ $1 =~ [0-9]{4}-[0-9]{2} ]]; then
-  /srv/newsstats/bin/groupstats.pl --nocomments --sums --format dump --month $1 | /srv/newsstats/bin/postingstats.pl --month $1 | /srv/newsstats/contrib/tinews.pl -X -Y
-  /srv/newsstats/bin/hoststats.pl --nocomments --sums --format dump --month $1 | /srv/newsstats/bin/postingstats.pl -t server --month $1 | /srv/newsstats/contrib/tinews.pl -X -Y
-  /srv/newsstats/bin/clientstats.pl --nocomments --sums --versions --format dump --month $1 | /srv/newsstats/bin/postingstats.pl -t client --month $1 | /srv/newsstats/contrib/tinews.pl -X -Y
-else
-  echo 'Input error, please use dopostingstats.sh YYYY-MM'
+
+# get month
+MONTH=$1
+if ! [[ $1 =~ [0-9]{4}-[0-9]{2} ]]; then
+  MONTH=$(date -d "$(date +%Y-%m-15) -1 month" '+%Y-%m')
 fi
 
+# post stats
+/srv/newsstats/bin/groupstats.pl --nocomments --sums --format dump --month $MONTH | /srv/newsstats/bin/postingstats.pl --month $MONTH | /srv/newsstats/contrib/tinews.pl -X -Y
+/srv/newsstats/bin/hoststats.pl --nocomments --sums --format dump --month $MONTH | /srv/newsstats/bin/postingstats.pl -t server --month $MONTH | /srv/newsstats/contrib/tinews.pl -X -Y
+/srv/newsstats/bin/clientstats.pl --nocomments --sums --versions --format dump --month $MONTH | /srv/newsstats/bin/postingstats.pl -t client --month $MONTH | /srv/newsstats/contrib/tinews.pl -X -Y
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 1a442c5..323e178 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -14,6 +14,7 @@ NewsStats 0.4.0 (unreleased)
   * gatherstats: Remove whitespace from client and version.
   * Fix version queries.
   * Add ClientStats to dopostingstats.
+  * Let dopostingstats default to last month.
 
 NewsStats 0.3.0 (2025-05-18)
   * Extract GroupStats (in gatherstats) to subroutine.