diff --git a/libraries/net/cellular/CellularUSBModem/serial/usb/USBSerialStream.h b/libraries/net/cellular/CellularUSBModem/serial/usb/USBSerialStream.h
index 854570e22f..97cf3c6860 100644
--- a/libraries/net/cellular/CellularUSBModem/serial/usb/USBSerialStream.h
+++ b/libraries/net/cellular/CellularUSBModem/serial/usb/USBSerialStream.h
@@ -36,7 +36,7 @@ This class is not thread-safe, except for the *Abort() methods that can be calle
 class USBSerialStream : public IOStream, IUSBHostSerialListener
 {
 public:
-  enum { CIRCBUF_SIZE = 127 }
+  enum { CIRCBUF_SIZE = 127 };
   USBSerialStream(IUSBHostSerial& serial);
   /*virtual*/ ~USBSerialStream();