diff --git a/keywords.txt b/keywords.txt
index e0b30547..a7d5d12e 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -124,7 +124,7 @@ setSyncWord	KEYWORD2
 setOutputPower	KEYWORD2
 setCurrentLimit	KEYWORD2
 setPreambleLength	KEYWORD2
-setPreamblePolarity KEYWORD2
+invertPreamble	KEYWORD2
 setGain	KEYWORD2
 getFrequencyError	KEYWORD2
 getRSSI	KEYWORD2
diff --git a/src/modules/SX127x/SX127x.cpp b/src/modules/SX127x/SX127x.cpp
index a5257f35..38fb6979 100644
--- a/src/modules/SX127x/SX127x.cpp
+++ b/src/modules/SX127x/SX127x.cpp
@@ -119,7 +119,7 @@ int16_t SX127x::beginFSK(uint8_t* chipVersions, uint8_t numVersions, float freqD
   RADIOLIB_ASSERT(state);
 
   // set preamble polarity
-  state = setPreamblePolarity(RADIOLIB_SX127X_PREAMBLE_POLARITY_55);
+  state = invertPreamble(false);
   RADIOLIB_ASSERT(state);
 
   // set default sync word
@@ -786,7 +786,7 @@ int16_t SX127x::setPreambleLength(size_t preambleLength) {
   return(RADIOLIB_ERR_UNKNOWN);
 }
 
-int16_t SX127x::setPreamblePolarity(int polarity) {
+int16_t SX127x::invertPreamble(bool enable) {
   // set mode to standby
   int16_t state = setMode(RADIOLIB_SX127X_STANDBY);
   RADIOLIB_ASSERT(state);
@@ -794,10 +794,11 @@ int16_t SX127x::setPreamblePolarity(int polarity) {
   // check active modem
   uint8_t modem = getActiveModem();
   if(modem == RADIOLIB_SX127X_LORA) {
-      return(RADIOLIB_ERR_WRONG_MODEM);
+    return(RADIOLIB_ERR_WRONG_MODEM);
   } else if(modem == RADIOLIB_SX127X_FSK_OOK) {
     // set preamble polarity
-    state =this->mod->SPIsetRegValue(RADIOLIB_SX127X_REG_SYNC_CONFIG, polarity, 5, 5);
+    uint8_t polarity = enable ? RADIOLIB_SX127X_PREAMBLE_POLARITY_AA : RADIOLIB_SX127X_PREAMBLE_POLARITY_55;
+    state = this->mod->SPIsetRegValue(RADIOLIB_SX127X_REG_SYNC_CONFIG, polarity, 5, 5);
     return(state);
   }
 
diff --git a/src/modules/SX127x/SX127x.h b/src/modules/SX127x/SX127x.h
index 9b0ebf1b..59fc29a5 100644
--- a/src/modules/SX127x/SX127x.h
+++ b/src/modules/SX127x/SX127x.h
@@ -879,11 +879,11 @@ class SX127x: public PhysicalLayer {
     int16_t setPreambleLength(size_t preambleLength) override;
 
     /*!
-      \brief Sets FSK preamble polarity. Allowed values are RADIOLIB_SX127X_PREAMBLE_POLARITY_55 or RADIOLIB_SX127X_PREAMBLE_POLARITY_AA. Not allowed in LoRa mode.
-      \param polarity Preamble polarity bit in FSK mode).
+      \brief Invert FSK preamble polarity. The default (non-inverted) is 0x55, the inverted is 0xAA.
+      \param enable Preamble polarity in FSK mode - 0xAA when true, 0x55 when false.
       \returns \ref status_codes
     */
-    int16_t setPreamblePolarity(int polarity);
+    int16_t invertPreamble(bool enable);
 
     /*!
       \brief Gets frequency error of the latest received packet.