diff --git a/firmware/usb.c b/firmware/usb.c
index 23edf7b1c5..d513d10e55 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -348,4 +348,9 @@ void usb_start_monitoring(void)
 {
 }
 
+bool usb_detect(void)
+{
+    return false;
+}
+
 #endif