diff --git a/src/Driver/ApcuDriver.php b/src/Driver/ApcuDriver.php
index 3d357ed..b4f5c33 100644
--- a/src/Driver/ApcuDriver.php
+++ b/src/Driver/ApcuDriver.php
@@ -135,7 +135,15 @@ class ApcuDriver extends AbstractDriver {
 	 */
 	public function flush(): bool
 	{
-		return \apcu_clear_cache();
+		if (function_exists('apcu_clear_cache'))
+		{
+			return \apcu_clear_cache();
+		}
+		
+		if (function_exists('apc_clear_cache'))
+		{
+			return \apc_clear_cache();
+		}
 	}
 
 	/**