diff --git a/examples/companion_radio/ui-new/UITask.cpp b/examples/companion_radio/ui-new/UITask.cpp
index 87c37bb1..0fb86dec 100644
--- a/examples/companion_radio/ui-new/UITask.cpp
+++ b/examples/companion_radio/ui-new/UITask.cpp
@@ -66,6 +66,11 @@ public:
     display.setTextSize(1);
     display.drawTextCentered(display.width()/2, 42, FIRMWARE_BUILD_DATE);
 
+#ifdef FIRMWARE_PLUS_BUILD
+    display.setColor(DisplayDriver::YELLOW);
+    display.drawTextCentered(display.width()/2, 54, "+ unofficial build");
+#endif
+
     return 1000;
   }
 
diff --git a/variants/wio-tracker-l1/platformio.ini b/variants/wio-tracker-l1/platformio.ini
index 115d686f..34d21989 100644
--- a/variants/wio-tracker-l1/platformio.ini
+++ b/variants/wio-tracker-l1/platformio.ini
@@ -68,6 +68,7 @@ build_flags = ${WioTrackerL1.build_flags}
   -D OFFLINE_QUEUE_SIZE=256
   -D PIN_BUZZER=12
   -D QSPIFLASH=1
+  -D FIRMWARE_PLUS_BUILD=1
 ; NOTE: DO NOT ENABLE -->  -D MESH_PACKET_LOGGING=1
 ; NOTE: DO NOT ENABLE -->  -D MESH_DEBUG=1
 build_src_filter = ${WioTrackerL1.build_src_filter}
@@ -106,6 +107,7 @@ build_flags = ${WioTrackerL1.build_flags}
   -D PIN_BUZZER=12
   -D QSPIFLASH=1
   -D ADVERT_NAME='"@@MAC"'
+  -D FIRMWARE_PLUS_BUILD=1
   -D ENV_PIN_SDA=PIN_WIRE1_SDA
   -D ENV_PIN_SCL=PIN_WIRE1_SCL
   ; -D MESH_PACKET_LOGGING=1