diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index ed4a42d43..652c26409 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -268,7 +268,6 @@ void memswap(void * a, void * b, uint8_t size);
   #define IS_POT_AVAILABLE(x)          (IS_POT(x) && POT_CONFIG(x)!=POT_NONE)
   #define IS_POT_SLIDER_AVAILABLE(x)   (IS_POT_AVAILABLE(x) || IS_SLIDER_AVAILABLE(x))
   #define IS_MULTIPOS_CALIBRATED(cal)  (cal->count>0 && cal->count<XPOTS_MULTIPOS_COUNT)
-  #define IS_SWITCH_MULTPOS(x)         (SWSRC_FIRST_MULTIPOS_SWITCH <= (x) && (x) <= SWSRC_LAST_MULTIPOS_SWITCH)
 #elif defined(PCBX7) || defined(PCBXLITE)
   #define POT_CONFIG(x)                ((g_eeGeneral.potsConfig >> (2*((x)-POT1)))&0x03)
   #define IS_POT_MULTIPOS(x)           (IS_POT(x) && POT_CONFIG(x)==POT_MULTIPOS_SWITCH)
@@ -276,12 +275,16 @@ void memswap(void * a, void * b, uint8_t size);
   #define IS_POT_AVAILABLE(x)          (IS_POT(x) && POT_CONFIG(x)!=POT_NONE)
   #define IS_POT_SLIDER_AVAILABLE(x)   (IS_POT_AVAILABLE(x))
   #define IS_MULTIPOS_CALIBRATED(cal)  (cal->count>0 && cal->count<XPOTS_MULTIPOS_COUNT)
-  #define IS_SWITCH_MULTPOS(x)         (SWSRC_FIRST_MULTIPOS_SWITCH <= (x) && (x) <= SWSRC_LAST_MULTIPOS_SWITCH)
 #else
   #define IS_POT_MULTIPOS(x)           (false)
   #define IS_POT_WITHOUT_DETENT(x)     (true)
   #define IS_POT_SLIDER_AVAILABLE(x)   (true)
   #define IS_MULTIPOS_CALIBRATED(cal)  (false)
+#endif
+
+#if NUM_XPOTS > 0
+  #define IS_SWITCH_MULTPOS(x)         (SWSRC_FIRST_MULTIPOS_SWITCH <= (x) && (x) <= SWSRC_LAST_MULTIPOS_SWITCH)
+#else
   #define IS_SWITCH_MULTPOS(x)         (false)
 #endif