diff --git a/lib/private/Memcache/LoggerWrapperCache.php b/lib/private/Memcache/LoggerWrapperCache.php
index 55d5104dedb..a59520a11e5 100644
--- a/lib/private/Memcache/LoggerWrapperCache.php
+++ b/lib/private/Memcache/LoggerWrapperCache.php
@@ -75,7 +75,7 @@ class LoggerWrapperCache extends Cache implements IMemcacheTTL {
 			FILE_APPEND
 		);
 
-		return $this->wrappedCache->set($key, $value, $$ttl);
+		return $this->wrappedCache->set($key, $value, $ttl);
 	}
 
 	/** @inheritDoc */