diff --git a/libraries/AP_HAL_FLYMAPLE/HAL_FLYMAPLE_Class.cpp b/libraries/AP_HAL_FLYMAPLE/HAL_FLYMAPLE_Class.cpp
index d9d3d7d3bf..8abb7d1fec 100644
--- a/libraries/AP_HAL_FLYMAPLE/HAL_FLYMAPLE_Class.cpp
+++ b/libraries/AP_HAL_FLYMAPLE/HAL_FLYMAPLE_Class.cpp
@@ -51,6 +51,7 @@ HAL_FLYMAPLE::HAL_FLYMAPLE() :
         &uartCDriver,
         NULL,            /* no uartD */
         NULL,            /* no uartE */
+        NULL,            /* no uartF */
         NULL,
         &i2cDriver,
         NULL,   /* only 1 i2c */