diff --git a/services/std_svc/sdei/sdei_intr_mgmt.c b/services/std_svc/sdei/sdei_intr_mgmt.c
index 5d176c2..399c2ec 100644
--- a/services/std_svc/sdei/sdei_intr_mgmt.c
+++ b/services/std_svc/sdei/sdei_intr_mgmt.c
@@ -531,7 +531,7 @@
 	if (is_event_shared(map))
 		sdei_map_unlock(map);
 
-	SDEI_LOG("ACK %llx, ev:%d ss:%d spsr:%lx ELR:%lx\n", mpidr, map->ev_num,
+	SDEI_LOG("ACK %llx, ev:0x%x ss:%d spsr:%lx ELR:%lx\n", mpidr, map->ev_num,
 			sec_state, read_spsr_el3(), read_elr_el3());
 
 	ctx = handle;
@@ -568,7 +568,7 @@
 	 * interrupt.
 	 */
 	if ((map->ev_num != SDEI_EVENT_0) && !is_map_bound(map)) {
-		ERROR("Invalid SDEI mapping: ev=%u\n", map->ev_num);
+		ERROR("Invalid SDEI mapping: ev=0x%x\n", map->ev_num);
 		panic();
 	}
 	plat_ic_end_of_interrupt(intr_raw);
@@ -703,7 +703,7 @@
 	/* Having done sanity checks, pop dispatch */
 	(void) pop_dispatch();
 
-	SDEI_LOG("EOI:%lx, %d spsr:%lx elr:%lx\n", read_mpidr_el1(),
+	SDEI_LOG("EOI:%lx, 0x%x spsr:%lx elr:%lx\n", read_mpidr_el1(),
 			map->ev_num, read_spsr_el3(), read_elr_el3());
 
 	/*
diff --git a/services/std_svc/sdei/sdei_main.c b/services/std_svc/sdei/sdei_main.c
index 5371df1..4ceaae8 100644
--- a/services/std_svc/sdei/sdei_main.c
+++ b/services/std_svc/sdei/sdei_main.c
@@ -966,7 +966,7 @@
 
 	case SDEI_EVENT_REGISTER:
 		x5 = SMC_GET_GP(ctx, CTX_GPREG_X5);
-		SDEI_LOG("> REG(n:%d e:%llx a:%llx f:%x m:%llx)\n", ev_num,
+		SDEI_LOG("> REG(n:0x%x e:%llx a:%llx f:%x m:%llx)\n", ev_num,
 				x2, x3, (int) x4, x5);
 		ret = sdei_event_register(ev_num, x2, x3, x4, x5);
 		SDEI_LOG("< REG:%lld\n", ret);
@@ -979,7 +979,7 @@
 		SMC_RET1(ctx, ret);
 
 	case SDEI_EVENT_DISABLE:
-		SDEI_LOG("> DISABLE(n:%d)\n", ev_num);
+		SDEI_LOG("> DISABLE(n:0x%x)\n", ev_num);
 		ret = sdei_event_disable(ev_num);
 		SDEI_LOG("< DISABLE:%lld\n", ret);
 		SMC_RET1(ctx, ret);
@@ -1013,19 +1013,19 @@
 		SMC_RET0(ctx);
 
 	case SDEI_EVENT_STATUS:
-		SDEI_LOG("> STAT(n:%d)\n", ev_num);
+		SDEI_LOG("> STAT(n:0x%x)\n", ev_num);
 		ret = sdei_event_status(ev_num);
 		SDEI_LOG("< STAT:%lld\n", ret);
 		SMC_RET1(ctx, ret);
 
 	case SDEI_EVENT_GET_INFO:
-		SDEI_LOG("> INFO(n:%d, %d)\n", ev_num, (int) x2);
+		SDEI_LOG("> INFO(n:0x%x, %d)\n", ev_num, (int) x2);
 		ret = sdei_event_get_info(ev_num, (int) x2);
 		SDEI_LOG("< INFO:%lld\n", ret);
 		SMC_RET1(ctx, ret);
 
 	case SDEI_EVENT_UNREGISTER:
-		SDEI_LOG("> UNREG(n:%d)\n", ev_num);
+		SDEI_LOG("> UNREG(n:0x%x)\n", ev_num);
 		ret = sdei_event_unregister(ev_num);
 		SDEI_LOG("< UNREG:%lld\n", ret);
 		SMC_RET1(ctx, ret);
@@ -1049,7 +1049,7 @@
 		SMC_RET1(ctx, ret);
 
 	case SDEI_INTERRUPT_RELEASE:
-		SDEI_LOG("> REL(%d)\n", ev_num);
+		SDEI_LOG("> REL(0x%x)\n", ev_num);
 		ret = sdei_interrupt_release(ev_num);
 		SDEI_LOG("< REL:%lld\n", ret);
 		SMC_RET1(ctx, ret);
@@ -1067,7 +1067,7 @@
 		SMC_RET1(ctx, ret);
 
 	case SDEI_EVENT_ROUTING_SET:
-		SDEI_LOG("> ROUTE_SET(n:%d f:%llx aff:%llx)\n", ev_num, x2, x3);
+		SDEI_LOG("> ROUTE_SET(n:0x%x f:%llx aff:%llx)\n", ev_num, x2, x3);
 		ret = sdei_event_routing_set(ev_num, x2, x3);
 		SDEI_LOG("< ROUTE_SET:%lld\n", ret);
 		SMC_RET1(ctx, ret);
@@ -1079,7 +1079,7 @@
 		SMC_RET1(ctx, ret);
 
 	case SDEI_EVENT_SIGNAL:
-		SDEI_LOG("> SIGNAL(e:%d t:%llx)\n", ev_num, x2);
+		SDEI_LOG("> SIGNAL(e:0x%x t:%llx)\n", ev_num, x2);
 		ret = sdei_signal(ev_num, x2);
 		SDEI_LOG("< SIGNAL:%lld\n", ret);
 		SMC_RET1(ctx, ret);