diff --git a/static/defaults.config.php b/static/defaults.config.php
index ed0f8f871a..2bc2bea5b1 100644
--- a/static/defaults.config.php
+++ b/static/defaults.config.php
@@ -539,7 +539,8 @@ return [
 		'worker_fetch_limit' => 1,
 
 		// worker_fork (Boolean)
-		// Experimental setting. use pcntl_fork to spawn a new worker process
+		// Experimental setting. Use pcntl_fork to spawn a new worker process.
+		// Does not work when "worker_multiple_fetch" is enabled (Needs more testing)
 		'worker_fork' => false,
 
 		// worker_jpm (Boolean)
@@ -559,6 +560,7 @@ return [
 		// worker_multiple_fetch (Boolean)
 		// When activated, the worker fetches jobs for multiple workers (not only for itself).
 		// This is an experimental setting without knowing the performance impact.
+		// Does not work when "worker_fork" is enabled (Needs more testing)
 		'worker_multiple_fetch' => false,
 		
 		// worker_defer_limit (Integer)