diff --git a/DStarControl.cpp b/DStarControl.cpp
index e371d2c..e9aa4bf 100644
--- a/DStarControl.cpp
+++ b/DStarControl.cpp
@@ -13,6 +13,7 @@
 
 #include "DStarControl.h"
 #include "Utils.h"
+#include "Sync.h"
 #include "Log.h"
 
 #include <cassert>
@@ -231,7 +232,7 @@ bool CDStarControl::writeModem(unsigned char *data)
 
 			// Regenerate the sync
 			if (m_n == 0U)
-				::memcpy(data + DSTAR_VOICE_FRAME_LENGTH_BYTES + 1U, DSTAR_SYNC_BYTES, DSTAR_DATA_FRAME_LENGTH_BYTES);
+				CSync::addDStarSync(data + 1U);
 
 			m_n = (m_n + 1U) % 21U;
 
@@ -486,7 +487,7 @@ void CDStarControl::writeNetwork()
 
 		// Regenerate the sync
 		if (n == 0U)
-			::memcpy(data + DSTAR_VOICE_FRAME_LENGTH_BYTES + 2U, DSTAR_SYNC_BYTES, DSTAR_DATA_FRAME_LENGTH_BYTES);
+			CSync::addDStarSync(data + 2U);
 
 		m_n = n;
 
diff --git a/Sync.cpp b/Sync.cpp
index 6bca463..648da79 100644
--- a/Sync.cpp
+++ b/Sync.cpp
@@ -17,12 +17,23 @@
  */
 
 #include "Sync.h"
+
+#include "DStarDefines.h"
 #include "DMRDefines.h"
+#include "YSFDefines.h"
 
 #include <cstdio>
 #include <cassert>
+#include <cstring>
 
 
+void CSync::addDStarSync(unsigned char* data)
+{
+	assert(data != NULL);
+
+	::memcpy(data + DSTAR_VOICE_FRAME_LENGTH_BYTES, DSTAR_SYNC_BYTES, DSTAR_DATA_FRAME_LENGTH_BYTES);
+}
+
 void CSync::addDMRDataSync(unsigned char* data)
 {
 	assert(data != NULL);
@@ -38,3 +49,10 @@ void CSync::addDMRAudioSync(unsigned char* data)
 	for (unsigned int i = 0U; i < 7U; i++)
 		data[i + 13U] = (data[i + 13U] & ~SYNC_MASK[i]) | BS_SOURCED_AUDIO_SYNC[i];
 }
+
+void CSync::addYSFSync(unsigned char* data)
+{
+	assert(data != NULL);
+
+	::memcpy(data, YSF_SYNC_BYTES, YSF_SYNC_LENGTH_BYTES);
+}
diff --git a/Sync.h b/Sync.h
index 507662e..ac4ac65 100644
--- a/Sync.h
+++ b/Sync.h
@@ -22,9 +22,13 @@
 class CSync
 {
 public:
+	static void addDStarSync(unsigned char* data);
+
 	static void addDMRDataSync(unsigned char* data);
 	static void addDMRAudioSync(unsigned char* data);
 
+	static void addYSFSync(unsigned char* data);
+
 private:
 };
 
diff --git a/YSFDefines.h b/YSFDefines.h
index f713e5b..d1bed14 100644
--- a/YSFDefines.h
+++ b/YSFDefines.h
@@ -22,6 +22,7 @@
 const unsigned int YSF_FRAME_LENGTH_BYTES = 120U;
 
 const unsigned char YSF_SYNC_BYTES[] = {0xD4U, 0x71U, 0xC9U, 0x63U, 0x4DU};
+const unsigned int YSF_SYNC_LENGTH_BYTES = 5U;
 
 const unsigned char YSF_FI_MASK = 0xC0U;
 const unsigned char YSF_DT_MASK = 0x30U;