diff --git a/ChangeLog b/ChangeLog
index 0e8870c..bc428c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 yapfaq 1.1.1 (unreleased)
   * Warn for missing .rc file.
+  * Add trailing slash to --datadir, if missing.
 
 yapfaq 1.1.0 (2026-02-13)
   * --test: Set Supersedes and don't modify Message-ID if -o is set.
diff --git a/bin/yapfaq.pl b/bin/yapfaq.pl
index 80dcbde..ec01ab8 100755
--- a/bin/yapfaq.pl
+++ b/bin/yapfaq.pl
@@ -120,6 +120,9 @@ if ($OptSimulation) {
 # -t implies -o if -n is not set
 $OptOutput = 1 if $OptTest && !$OptNewsgroup;
 
+# add trailing slash to $Config{'datadir'}, if necessary
+$Config{'datadir'} .= '/' if $Config{'datadir'} !~ /\/$/;
+
 ### create list of @Projects from $Config{'datadir'} unless -p is set
 my @Projects;
 if (!$OptProject) {