diff --git a/lib/membrane/pipeline.ex b/lib/membrane/pipeline.ex
index e6002704e..6f47b61bb 100644
--- a/lib/membrane/pipeline.ex
+++ b/lib/membrane/pipeline.ex
@@ -374,7 +374,7 @@ defmodule Membrane.Pipeline do
     end
   end
 
-  @spec call(pid, any, timeout()) :: :ok
+  @spec call(pid, any, timeout()) :: term() 
   def call(pipeline, message, timeout \\ 5000) do
     GenServer.call(pipeline, message, timeout)
   end