diff --git a/libraries/AP_RCTelemetry/AP_Spektrum_Telem.cpp b/libraries/AP_RCTelemetry/AP_Spektrum_Telem.cpp
index d9539b1d5b..c1d81848a9 100644
--- a/libraries/AP_RCTelemetry/AP_Spektrum_Telem.cpp
+++ b/libraries/AP_RCTelemetry/AP_Spektrum_Telem.cpp
@@ -32,6 +32,7 @@
 #include <AP_GPS/AP_GPS.h>
 #include <AP_Baro/AP_Baro.h>
 #include <AP_RTC/AP_RTC.h>
+#include <AP_SerialManager/AP_SerialManager.h>
 #ifdef HAVE_AP_BLHELI_SUPPORT
 #include <AP_BLheli/AP_BLHeli.h>
 #endif
diff --git a/libraries/AP_RCTelemetry/AP_Spektrum_Telem.h b/libraries/AP_RCTelemetry/AP_Spektrum_Telem.h
index 27001b09ef..3ae1900d6d 100644
--- a/libraries/AP_RCTelemetry/AP_Spektrum_Telem.h
+++ b/libraries/AP_RCTelemetry/AP_Spektrum_Telem.h
@@ -22,7 +22,6 @@
 
 #if HAL_SPEKTRUM_TELEM_ENABLED
 
-#include <AP_SerialManager/AP_SerialManager.h>
 #include <AP_HAL/utility/RingBuffer.h>
 #include "AP_RCTelemetry.h"