diff --git a/src/schedule/zephyr_dp_schedule_application.c b/src/schedule/zephyr_dp_schedule_application.c
index 80fe50be31de..b7c4eac5626b 100644
--- a/src/schedule/zephyr_dp_schedule_application.c
+++ b/src/schedule/zephyr_dp_schedule_application.c
@@ -12,6 +12,7 @@
 #include <sof/audio/component.h>
 #include <sof/common.h>
 #include <sof/ipc/common.h>
+#include <sof/lib/mailbox.h>
 #include <sof/list.h>
 #include <sof/llext_manager.h>
 #include <sof/objpool.h>