diff --git a/lib/private/Memcache/APCu.php b/lib/private/Memcache/APCu.php
index 7f6a73354eed1..9eb2ee0b2bf14 100644
--- a/lib/private/Memcache/APCu.php
+++ b/lib/private/Memcache/APCu.php
@@ -25,6 +25,9 @@ public function get($key) {
 	}
 
 	public function set($key, $value, $ttl = 0) {
+		if ($ttl === 0) {
+			$ttl = self::DEFAULT_TTL;
+		}
 		return apcu_store($this->getPrefix() . $key, $value, $ttl);
 	}
 
@@ -56,6 +59,9 @@ public function clear($prefix = '') {
 	 * @return bool
 	 */
 	public function add($key, $value, $ttl = 0) {
+		if ($ttl === 0) {
+			$ttl = self::DEFAULT_TTL;
+		}
 		return apcu_add($this->getPrefix() . $key, $value, $ttl);
 	}
 
diff --git a/lib/public/ICache.php b/lib/public/ICache.php
index ba6016c8d283b..cc5a0add61488 100644
--- a/lib/public/ICache.php
+++ b/lib/public/ICache.php
@@ -15,6 +15,11 @@
  * @since 6.0.0
  */
 interface ICache {
+	/**
+	 * @since 30.0.0
+	 */
+	const DEFAULT_TTL = 24 * 60 * 60;
+
 	/**
 	 * Get a value from the user cache
 	 * @param string $key