diff --git a/DMRDefines.h b/DMRDefines.h
index 92a1ab0..f9eafbf 100644
--- a/DMRDefines.h
+++ b/DMRDefines.h
@@ -70,6 +70,7 @@ const unsigned char PAYLOAD_RIGHT_MASK[]      = {0x0FU, 0xFFU, 0xFFU, 0xFFU, 0xF
 
 const unsigned char VOICE_LC_HEADER_CRC_MASK[]    = {0x96U, 0x96U, 0x96U};
 const unsigned char TERMINATOR_WITH_LC_CRC_MASK[] = {0x99U, 0x99U, 0x99U};
+const unsigned char PI_HEADER_CRC_MASK[]          = {0x69U, 0x69U};
 const unsigned char DATA_HEADER_CRC_MASK[]        = {0xCCU, 0xCCU};
 const unsigned char CSBK_CRC_MASK[]               = {0xA5U, 0xA5U};
 
diff --git a/DMRSlot.cpp b/DMRSlot.cpp
index c992aef..c63b8bb 100644
--- a/DMRSlot.cpp
+++ b/DMRSlot.cpp
@@ -162,6 +162,12 @@ void CDMRSlot::writeModem(unsigned char *data)
 			// Convert the Data Sync to be from the BS
 			CSync::addDMRDataSync(data + 2U);
 
+			// Regenerate the payload
+			CBPTC19696 bptc;
+			unsigned char payload[12U];
+			bptc.decode(data + 2U, payload);
+			bptc.encode(payload, data + 2U);
+
 			data[0U] = TAG_DATA;
 			data[1U] = 0x00U;
 
@@ -667,6 +673,12 @@ void CDMRSlot::writeNetwork(const CDMRData& dmrData)
 		// Convert the Data Sync to be from the BS
 		CSync::addDMRDataSync(data + 2U);
 
+		// Regenerate the payload
+		CBPTC19696 bptc;
+		unsigned char payload[12U];
+		bptc.decode(data + 2U, payload);
+		bptc.encode(payload, data + 2U);
+
 		data[0U] = TAG_DATA;
 		data[1U] = 0x00U;