diff --git a/CHANGES.md b/CHANGES.md
index 67c2b3f..63ce64c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,10 @@ moodle-tool_redis
 Changes
 -------
 
+### Unreleased
+
+* 2024-08-21 - Replace deprecated print_error() with moodle_exception.
+
 ### v4.2-r2
 
 * 2024-08-11 - Add section for scheduled tasks to README
diff --git a/lib/redis-stats/config.php b/lib/redis-stats/config.php
index 54444a1..90d2491 100644
--- a/lib/redis-stats/config.php
+++ b/lib/redis-stats/config.php
@@ -66,7 +66,7 @@
 
 // Forth: If there isn't any Redis store configured, we should stop here.
 if (count($servers) < 1) {
-    print_error('noredisstoreconfigured', 'tool_redis');
+    throw new moodle_exception('noredisstoreconfigured', 'tool_redis');
 }
 
 // Show a 'Flush' button for databases.