diff --git a/src/modules/SX127x/SX1276.cpp b/src/modules/SX127x/SX1276.cpp
index 8c97f447..a52fa27a 100644
--- a/src/modules/SX127x/SX1276.cpp
+++ b/src/modules/SX127x/SX1276.cpp
@@ -37,6 +37,10 @@ int16_t SX1276::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1277.cpp b/src/modules/SX127x/SX1277.cpp
index a150c462..6b4a1a66 100644
--- a/src/modules/SX127x/SX1277.cpp
+++ b/src/modules/SX127x/SX1277.cpp
@@ -37,6 +37,10 @@ int16_t SX1277::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1279.cpp b/src/modules/SX127x/SX1279.cpp
index 179b7507..dff6e856 100644
--- a/src/modules/SX127x/SX1279.cpp
+++ b/src/modules/SX127x/SX1279.cpp
@@ -37,6 +37,10 @@ int16_t SX1279::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);