diff --git a/GlobalCache.php b/GlobalCache.php
index 87ef5e74aa..0344b3acbc 100644
--- a/GlobalCache.php
+++ b/GlobalCache.php
@@ -101,7 +101,7 @@
 
 $wgParserCacheType = 'mysql-multiwrite';
 
-$enableWarmup = ( $beta || preg_match( '/^[0-9a-p]/', $wgDBname ) ) && $wgDBname !== 'commonswiki';
+$enableWarmup = ( $beta || preg_match( '/^[0-9a-z]/', $wgDBname ) ) && $wgDBname !== 'commonswiki';
 $wgParsoidCacheConfig = [
 	// Defaults to MainStash
 	'StashType' => null,