diff --git a/src/modules/CC1101/CC1101.cpp b/src/modules/CC1101/CC1101.cpp
index 9c143ad9..0c4a9276 100644
--- a/src/modules/CC1101/CC1101.cpp
+++ b/src/modules/CC1101/CC1101.cpp
@@ -923,7 +923,7 @@ void CC1101::getExpMant(float target, uint16_t mantOffset, uint8_t divExp, uint8
 	}
 }
 
-int16_t CC1101::setPacketMode(uint8_t mode, uint8_t len) {
+int16_t CC1101::setPacketMode(uint8_t mode, uint16_t len) {
   // check length
   if (len > CC1101_MAX_PACKET_LENGTH) {
     return(ERR_PACKET_TOO_LONG);
diff --git a/src/modules/CC1101/CC1101.h b/src/modules/CC1101/CC1101.h
index 95e8f455..40c70791 100644
--- a/src/modules/CC1101/CC1101.h
+++ b/src/modules/CC1101/CC1101.h
@@ -950,7 +950,7 @@ class CC1101: public PhysicalLayer {
     int16_t config();
     int16_t directMode();
     static void getExpMant(float target, uint16_t mantOffset, uint8_t divExp, uint8_t expMax, uint8_t& exp, uint8_t& mant);
-    int16_t setPacketMode(uint8_t mode, uint8_t len);
+    int16_t setPacketMode(uint8_t mode, uint16_t len);
 };
 
 #endif