diff --git a/lib/private/User/User.php b/lib/private/User/User.php
index 23b24f0481bc9..0a51622428bb9 100644
--- a/lib/private/User/User.php
+++ b/lib/private/User/User.php
@@ -190,7 +190,7 @@ public function setSystemEMailAddress(string $mailAddress): void {
 			$this->setPrimaryEMailAddress('');
 		}
 
-		if ($oldMailAddress !== strtolower($mailAddress)) {
+		if ($oldMailAddress !== $mailAddress) {
 			$this->triggerChange('eMailAddress', $mailAddress, $oldMailAddress);
 		}
 	}