diff --git a/radio/src/gui/menu_model.cpp b/radio/src/gui/menu_model.cpp
index 77c0617a2..4f9f6c139 100644
--- a/radio/src/gui/menu_model.cpp
+++ b/radio/src/gui/menu_model.cpp
@@ -5421,8 +5421,12 @@ void menuModelTelemetry(uint8_t event)
 
       case ITEM_TELEMETRY_USR_BLADES:
         lcd_putsLeft(y, STR_BLADES);
-        lcd_outdezAtt(TELEM_COL2+FWNUM, y, 2+g_model.frsky.blades, attr);
-        if (attr) CHECK_INCDEC_MODELVAR_ZERO(event, g_model.frsky.blades, 3);
+        lcd_outdezAtt(TELEM_COL2+FWNUM, y, 1+g_model.frsky.blades, attr);
+#if defined(CPUARM)
+        if (attr) CHECK_INCDEC_MODELVAR(event, g_model.frsky.blades, MIN_BLADES, MAX_BLADES);
+#else
+        if (attr) CHECK_INCDEC_MODELVAR_ZERO(event, g_model.frsky.blades, MAX_BLADES);
+#endif
         break;
 #endif
 
diff --git a/radio/src/myeeprom.h b/radio/src/myeeprom.h
index f06ef0ef6..d91b0d507 100644
--- a/radio/src/myeeprom.h
+++ b/radio/src/myeeprom.h
@@ -977,7 +977,7 @@ PACK(typedef struct t_FrSkyData {
   uint8_t usrProto; // Protocol in FrSky user data, 0=None, 1=FrSky hub, 2=WS HowHigh, 3=Halcyon
   uint8_t voltsSource:7;
   uint8_t altitudeDisplayed:1;
-  uint8_t blades;   // How many blades for RPMs, 0=2 blades, 1=3 blades
+  int8_t blades;    // How many blades for RPMs, 0=2 blades
   uint8_t currentSource;
   uint8_t screensType;
   FrSkyScreenData screens[MAX_FRSKY_SCREENS];
@@ -991,12 +991,14 @@ PACK(typedef struct t_FrSkyData {
   uint16_t storedMah:15;
   int8_t   fasOffset;
 }) FrSkyData;
+#define MIN_BLADES -1 // 1 blade
+#define MAX_BLADES 3  // 5 blades
 #else
 #define MAX_FRSKY_SCREENS 2
 PACK(typedef struct t_FrSkyData {
   FrSkyChannelData channels[2];
   uint8_t usrProto:2; // Protocol in FrSky user data, 0=None, 1=FrSky hub, 2=WS HowHigh, 3=Halcyon
-  uint8_t blades:2;   // How many blades for RPMs, 0=2 blades, 1=3 blades
+  uint8_t blades:2;   // How many blades for RPMs, 0=2 blades
   uint8_t screensType:2;
   uint8_t voltsSource:2;
   int8_t  varioMin:4;
@@ -1009,6 +1011,8 @@ PACK(typedef struct t_FrSkyData {
   int8_t  varioCenterMax:5;
   int8_t  fasOffset;
 }) FrSkyData;
+#define MIN_BLADES 0 // 2 blades
+#define MAX_BLADES 3 // 5 blades
 #endif
 
 #if defined(MAVLINK)