diff --git a/include/runtime_services/ffa_helpers.h b/include/runtime_services/ffa_helpers.h
index eddd55a..b25b6a1 100644
--- a/include/runtime_services/ffa_helpers.h
+++ b/include/runtime_services/ffa_helpers.h
@@ -70,6 +70,9 @@
 
 #define FFA_NOTIFICATIONS_FLAG_PER_VCPU	UINT32_C(0x1 << 0)
 
+/** Flag to delay Schedule Receiver Interrupt. */
+#define FFA_NOTIFICATIONS_FLAG_DELAY_SRI	UINT32_C(0x1 << 1)
+
 #define FFA_NOTIFICATIONS_FLAGS_VCPU_ID(id) UINT32_C((id & 0xFFFF) << 16)
 
 #define FFA_NOTIFICATIONS_FLAG_BITMAP_SP	UINT32_C(0x1 << 0)