diff --git a/src/SharedMemory.h b/src/SharedMemory.h
index 82204f2..4308935 100644
--- a/src/SharedMemory.h
+++ b/src/SharedMemory.h
@@ -12,7 +12,7 @@ extern int memory_id;
 
 
 //Shared-Memory-Segment erstellen oder öffnen – shmget()
-void shared_memory_init();
+void shared_memory_init(key_t key);
 
 //Shared-Memory-Segment id weiterreichen
 int get_shared_memory_id();