diff --git a/src/components/ble/AlertNotificationService.cpp b/src/components/ble/AlertNotificationService.cpp
index 9b9b4e9e..14d58d51 100644
--- a/src/components/ble/AlertNotificationService.cpp
+++ b/src/components/ble/AlertNotificationService.cpp
@@ -9,7 +9,7 @@ using namespace Pinetime::Controllers;
 
 constexpr ble_uuid16_t AlertNotificationService::ansUuid;
 constexpr ble_uuid16_t AlertNotificationService::ansCharUuid;
-constexpr ble_uuid16_t AlertNotificationService::ansEventUuid;
+constexpr ble_uuid128_t AlertNotificationService::notificationEventUuid;
 
 
 int AlertNotificationCallback(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg) {
@@ -35,7 +35,7 @@ AlertNotificationService::AlertNotificationService ( System::SystemTask& systemT
                         .flags = BLE_GATT_CHR_F_WRITE
                 },
                 {
-                        .uuid = (ble_uuid_t *) &ansEventUuid,
+                        .uuid = (ble_uuid_t *) &notificationEventUuid,
                         .access_cb = AlertNotificationCallback,
                         .arg = this,
                         .flags = BLE_GATT_CHR_F_NOTIFY,
diff --git a/src/components/ble/AlertNotificationService.h b/src/components/ble/AlertNotificationService.h
index 558cdf54..7c99d3de 100644
--- a/src/components/ble/AlertNotificationService.h
+++ b/src/components/ble/AlertNotificationService.h
@@ -7,6 +7,9 @@
 #undef max
 #undef min
 
+//c7e50000-78fc-48fe-8e23-433b3a1942d1
+#define NOTIFICATION_EVENT_SERVICE_UUID_BASE {0xd1, 0x42, 0x19, 0x3a, 0x3b, 0x43, 0x23, 0x8e, 0xfe, 0x48, 0xfc, 0x78, 0x00, 0x00, 0xe5, 0xc7}
+
 namespace Pinetime {
 
   namespace System {
@@ -45,7 +48,6 @@ namespace Pinetime {
 
         static constexpr uint16_t ansId {0x1811};
         static constexpr uint16_t ansCharId {0x2a46};
-        static constexpr uint16_t ansEventCharId = {0x2a47};
 
         static constexpr ble_uuid16_t ansUuid {
                 .u { .type = BLE_UUID_TYPE_16 },
@@ -57,9 +59,9 @@ namespace Pinetime {
                 .value = ansCharId
         };
 
-        static constexpr ble_uuid16_t ansEventUuid {
-                .u { .type = BLE_UUID_TYPE_16 },
-                .value = ansEventCharId
+        static constexpr ble_uuid128_t notificationEventUuid {
+                .u { .type = BLE_UUID_TYPE_128 },
+                .value = NOTIFICATION_EVENT_SERVICE_UUID_BASE
         };
 
         struct ble_gatt_chr_def characteristicDefinition[3];