diff --git a/keywords.txt b/keywords.txt
index 31db163d..a0b8ea6c 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -146,6 +146,9 @@ setFHSSHoppingPeriod	KEYWORD2
 getFHSSHoppingPeriod	KEYWORD2
 getFHSSChannel	KEYWORD2
 clearFHSSInt	KEYWORD2
+randomByte	KEYWORD2
+getPacketLength
+
 
 # RF69-specific
 setAESKey	KEYWORD2
diff --git a/src/modules/SX126x/SX126x.h b/src/modules/SX126x/SX126x.h
index 8c9b34a3..73d31b43 100644
--- a/src/modules/SX126x/SX126x.h
+++ b/src/modules/SX126x/SX126x.h
@@ -827,7 +827,9 @@ class SX126x: public PhysicalLayer {
    float getRSSIInst();
 
    /*!
-     \brief Set implicit header mode for future reception/transmission.
+     \brief Set implicit header mode for future reception/transmission. Required for spreading factor 6.
+
+     \param len Payload length in bytes.
 
      \returns \ref status_codes
    */
@@ -836,8 +838,6 @@ class SX126x: public PhysicalLayer {
    /*!
      \brief Set explicit header mode for future reception/transmission.
 
-     \param len Payload length in bytes.
-
      \returns \ref status_codes
    */
    int16_t explicitHeader();
diff --git a/src/modules/SX127x/SX1272.h b/src/modules/SX127x/SX1272.h
index 7491ef2a..e4343b66 100644
--- a/src/modules/SX127x/SX1272.h
+++ b/src/modules/SX127x/SX1272.h
@@ -278,7 +278,9 @@ class SX1272: public SX127x {
     int16_t autoLDRO();
 
     /*!
-      \brief Set implicit header mode for future reception/transmission.
+     \brief Set implicit header mode for future reception/transmission. Required for spreading factor 6.
+
+      \param len Payload length in bytes.
 
       \returns \ref status_codes
     */
@@ -287,8 +289,6 @@ class SX1272: public SX127x {
     /*!
       \brief Set explicit header mode for future reception/transmission.
 
-      \param len Payload length in bytes.
-
       \returns \ref status_codes
     */
     int16_t explicitHeader();
diff --git a/src/modules/SX127x/SX1278.h b/src/modules/SX127x/SX1278.h
index 150b97c3..cffedc81 100644
--- a/src/modules/SX127x/SX1278.h
+++ b/src/modules/SX127x/SX1278.h
@@ -287,7 +287,9 @@ class SX1278: public SX127x {
     int16_t autoLDRO();
 
     /*!
-      \brief Set implicit header mode for future reception/transmission.
+     \brief Set implicit header mode for future reception/transmission. Required for spreading factor 6.
+
+      \param len Payload length in bytes.
 
       \returns \ref status_codes
     */
@@ -296,8 +298,6 @@ class SX1278: public SX127x {
     /*!
       \brief Set explicit header mode for future reception/transmission.
 
-      \param len Payload length in bytes.
-
       \returns \ref status_codes
     */
     int16_t explicitHeader();