diff --git a/radio/src/targets/pl18/board.h b/radio/src/targets/pl18/board.h
index 20670c742..9586ef16c 100644
--- a/radio/src/targets/pl18/board.h
+++ b/radio/src/targets/pl18/board.h
@@ -29,7 +29,7 @@
 #include "hal/serial_port.h"
 #include "hal/watchdog_driver.h"
 
-#ifdef ADC_GPIO_PIN_STICK_TH
+#if defined(ADC_GPIO_PIN_STICK_TH)
 #define SURFACE_RADIO  true
 #endif