diff --git a/components/bt/host/nimble/nimble b/components/bt/host/nimble/nimble
index 528a67f4e7..e4a6106885 160000
--- a/components/bt/host/nimble/nimble
+++ b/components/bt/host/nimble/nimble
@@ -1 +1 @@
-Subproject commit 528a67f4e73f9521609879587a1d7d2180e18372
+Subproject commit e4a61068854850910155a3f5950b10791c3d8381
diff --git a/components/bt/porting/nimble/include/nimble/hci_common.h b/components/bt/porting/nimble/include/nimble/hci_common.h
index 70eb982d4a..cb743efac1 100644
--- a/components/bt/porting/nimble/include/nimble/hci_common.h
+++ b/components/bt/porting/nimble/include/nimble/hci_common.h
@@ -1863,9 +1863,9 @@ struct ble_hci_ev_le_subev_transmit_power_report {
     uint16_t conn_handle;
     uint8_t  reason;
     uint8_t  phy;
-    uint8_t  transmit_power_level;
+    int8_t  transmit_power_level;
     uint8_t  transmit_power_level_flag;
-    uint8_t delta;
+    int8_t delta;
 } __attribute__((packed));
 
 #define BLE_HCI_LE_SUBEV_BIGINFO_ADV_REPORT         (0x22)
diff --git a/examples/bluetooth/nimble/blecent/main/main.c b/examples/bluetooth/nimble/blecent/main/main.c
index e6916f4a1d..ac16ece4eb 100644
--- a/examples/bluetooth/nimble/blecent/main/main.c
+++ b/examples/bluetooth/nimble/blecent/main/main.c
@@ -808,7 +808,7 @@ blecent_gap_event(struct ble_gap_event *event, void *arg)
 #if MYNEWT_VAL(BLE_POWER_CONTROL)
     case BLE_GAP_EVENT_TRANSMIT_POWER:
 	MODLOG_DFLT(INFO, "Transmit power event : status=%d conn_handle=%d reason=%d "
-                          "phy=%d power_level=%x power_level_flag=%d delta=%d",
+                          "phy=%d power_level=%d power_level_flag=%d delta=%d",
 		    event->transmit_power.status,
 		    event->transmit_power.conn_handle,
 		    event->transmit_power.reason,