diff --git a/executer/include/uprotocol.h b/executer/include/uprotocol.h
index e8dfe0ec..6c94ad86 100644
--- a/executer/include/uprotocol.h
+++ b/executer/include/uprotocol.h
@@ -135,12 +135,17 @@ struct syscall_load_desc {
 	unsigned long size;
 };
 
+#define IHK_SCD_REQ_THREAD_SPINNING         0
+#define IHK_SCD_REQ_THREAD_TO_BE_WOKEN      1
+#define IHK_SCD_REQ_THREAD_DESCHEDULED      2
+
 struct syscall_response {
 	/* TID of the thread that requested the service */
 	int ttid;
 	/* TID of the mcexec thread that is serving or has served the request */
 	int stid;
 	unsigned long status;
+	unsigned long req_thread_status;
 	long ret;
 	unsigned long fault_address;
 	unsigned long fault_reason;
diff --git a/kernel/include/syscall.h b/kernel/include/syscall.h
index 1a107854..4d878290 100644
--- a/kernel/include/syscall.h
+++ b/kernel/include/syscall.h
@@ -224,12 +224,17 @@ struct ikc_scd_packet {
 	char padding[12];
 };
 
+#define IHK_SCD_REQ_THREAD_SPINNING         0
+#define IHK_SCD_REQ_THREAD_TO_BE_WOKEN      1
+#define IHK_SCD_REQ_THREAD_DESCHEDULED      2
+
 struct syscall_response {
 	/* TID of the thread that requested the service */
 	int ttid;
 	/* TID of the mcexec thread that is serving the request */
 	int stid;
 	unsigned long status;
+	unsigned long req_thread_status;
 	long ret;
 	unsigned long fault_address;
 	unsigned long fault_reason;