diff --git a/README.md b/README.md
index 4022d62..8841ad4 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ The DudeStar application used the Qt Widgets UI, while DroidStar uses the Qt Qui
 # M17 support 
 The Codec2 vocoder library is open source and is included as a C++ implementation of the original C library taken from the mvoice project.  More info on M17 can be found here: https://m17project.org/
 
-M17 SMS type (0x06) packet support has been added to DroidStar.  A text input and SMS send button is available in the log tab when in M17 mode.
+M17 SMS type (0x05) packet support has been added to DroidStar.  A text input and SMS send button is available in the log tab when in M17 mode.
 
 # MMDVM support -- work in progress
 DroidStar supports MMDVM and MMDVM_HS (hotspot) modems, with basic (possibly buggy) support for M17, D-STAR, Fusion, and DMR.  Support for P25 and NXDN coming soon.  When connecting to a digital mode reflector/DMR server and selecting an MMDVM device under Modems, then DroidStar acts as a hotspot/repeater.  When 'MMDVM Direct' (currently M17 only) is selected as the host, then DroidStar becomes a stand-alone transceiver.
diff --git a/m17.cpp b/m17.cpp
index 8f78e99..744ba28 100755
--- a/m17.cpp
+++ b/m17.cpp
@@ -969,7 +969,7 @@ void M17::tx_packet(QString sms)
     }
 
     encodeCRC16(lsf, M17_LSF_LENGTH_BYTES);
-    txframe.append(0x06); // SMS packet type
+    txframe.append(0x05); // SMS packet type
     txframe.append(sms.toUtf8());
     txframe.append(1, 0x00);
     txframe.append(lsf[28]);