diff --git a/P25RX.cpp b/P25RX.cpp
index 1633761..909c48b 100644
--- a/P25RX.cpp
+++ b/P25RX.cpp
@@ -278,8 +278,8 @@ void CP25RX::writeRSSILdu(uint8_t* ldu)
   if (m_rssiCount > 0U) {
     uint16_t rssi = m_rssiAccum / m_rssiCount;
 
-    ldu[216U] = (rssi >> 8) & 0xFFU;
-    ldu[217U] = (rssi >> 0) & 0xFFU;
+    ldu[217U] = (rssi >> 8) & 0xFFU;
+    ldu[218U] = (rssi >> 0) & 0xFFU;
 
     serial.writeP25Ldu(ldu, P25_LDU_FRAME_LENGTH_BYTES + 3U);
   } else {
diff --git a/YSFRX.cpp b/YSFRX.cpp
index 2d85c84..a35ef30 100644
--- a/YSFRX.cpp
+++ b/YSFRX.cpp
@@ -257,8 +257,8 @@ void CYSFRX::writeRSSIData(uint8_t* data)
   if (m_rssiCount > 0U) {
     uint16_t rssi = m_rssiAccum / m_rssiCount;
 
-    data[120U] = (rssi >> 8) & 0xFFU;
-    data[121U] = (rssi >> 0) & 0xFFU;
+    data[121U] = (rssi >> 8) & 0xFFU;
+    data[122U] = (rssi >> 0) & 0xFFU;
 
     serial.writeYSFData(data, YSF_FRAME_LENGTH_BYTES + 3U);
   } else {