diff --git a/libraries/AP_Radio/AP_Radio.cpp b/libraries/AP_Radio/AP_Radio.cpp
index 4ac4077f55..d32e32aa8e 100644
--- a/libraries/AP_Radio/AP_Radio.cpp
+++ b/libraries/AP_Radio/AP_Radio.cpp
@@ -1,6 +1,6 @@
 #include <AP_HAL/AP_HAL.h>
 
-#ifdef HAL_RCINPUT_WITH_AP_RADIO
+#if HAL_RCINPUT_WITH_AP_RADIO
 
 #include "AP_Radio.h"
 #include "AP_Radio_backend.h"
diff --git a/libraries/AP_Radio/AP_Radio_cc2500.cpp b/libraries/AP_Radio/AP_Radio_cc2500.cpp
index 912c941766..846ca8f138 100644
--- a/libraries/AP_Radio/AP_Radio_cc2500.cpp
+++ b/libraries/AP_Radio/AP_Radio_cc2500.cpp
@@ -8,7 +8,7 @@
 // #pragma GCC optimize("O0")
 
 #if CONFIG_HAL_BOARD == HAL_BOARD_CHIBIOS
-#ifdef HAL_RCINPUT_WITH_AP_RADIO
+#if HAL_RCINPUT_WITH_AP_RADIO
 
 #include <AP_Math/AP_Math.h>
 #include "AP_Radio_cc2500.h"
diff --git a/libraries/AP_Radio/AP_Radio_cypress.cpp b/libraries/AP_Radio/AP_Radio_cypress.cpp
index 20f64b265c..ad4921d5f6 100644
--- a/libraries/AP_Radio/AP_Radio_cypress.cpp
+++ b/libraries/AP_Radio/AP_Radio_cypress.cpp
@@ -1,6 +1,6 @@
 #include <AP_HAL/AP_HAL.h>
 
-#ifdef HAL_RCINPUT_WITH_AP_RADIO
+#if HAL_RCINPUT_WITH_AP_RADIO
 
 #include <AP_Math/AP_Math.h>
 #if CONFIG_HAL_BOARD == HAL_BOARD_PX4