diff --git a/keywords.txt b/keywords.txt
index 1448a752..b6ed434d 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -56,6 +56,7 @@ AX25Frame	KEYWORD1
 SSTVClient	KEYWORD1
 HellClient	KEYWORD1
 AFSKClient	KEYWORD1
+FSK4Client	KEYWORD1
 
 # SSTV modes
 Scottie1	KEYWORD1
diff --git a/src/RadioLib.h b/src/RadioLib.h
index 558eec22..d7717c8d 100644
--- a/src/RadioLib.h
+++ b/src/RadioLib.h
@@ -23,6 +23,7 @@
     - AX.25 (AX25Client)
     - SSTV (SSTVClient)
     - Hellschreiber (HellClient)
+    - 4-FSK (FSK4Client)
   - TransportLayer protocols
     - HTTP (HTTPClient)
     - MQTT (MQTTClient)