diff --git a/kernel/tasks.c b/kernel/tasks.c
index 32dc09ac..4a50ccb4 100644
--- a/kernel/tasks.c
+++ b/kernel/tasks.c
@@ -143,7 +143,7 @@ int join_kernel_task(tid_t id, void** result)
 	 * idle tasks are not allowed to wait for another task 
 	 * they should always run...
 	 */
-	if (BUILTIN_EXPECT(current_task->status, TASK_IDLE))
+	if (BUILTIN_EXPECT(current_task->status == TASK_IDLE, 0))
 		goto join_out;
 
 	/* a task is not able to wait for itself */