diff --git a/radio/src/bluetooth.cpp b/radio/src/bluetooth.cpp
index 9c81e7a69..b23b7441b 100644
--- a/radio/src/bluetooth.cpp
+++ b/radio/src/bluetooth.cpp
@@ -689,7 +689,7 @@ const char * Bluetooth::doFlashFirmware(const char * filename)
   const char * result;
   FIL file;
   uint8_t buffer[CC26XX_MAX_BYTES_PER_TRANSFER * 4];
-  UINT count;
+  UINT count = 0;
 
   // Dummy command
   bootloaderSendCommand(0);