diff --git a/M17TX.cpp b/M17TX.cpp
index eb19833..fb06a84 100644
--- a/M17TX.cpp
+++ b/M17TX.cpp
@@ -160,7 +160,7 @@ void CM17TX::writeByte(uint8_t c)
 
 void CM17TX::writeSilence()
 {
-  q15_t inBuffer[4U] = {0x00U, 0x00U, 0x00U, 0x00U};
+  q15_t inBuffer[4U] = {0, 0, 0, 0};
   q15_t outBuffer[M17_RADIO_SYMBOL_LENGTH * 4U];
 
   ::arm_fir_interpolate_q15(&m_modFilter, inBuffer, outBuffer, 4U);
diff --git a/NXDNTX.cpp b/NXDNTX.cpp
index c9cf1de..9a8bc18 100644
--- a/NXDNTX.cpp
+++ b/NXDNTX.cpp
@@ -175,7 +175,7 @@ void CNXDNTX::writeByte(uint8_t c)
 
 void CNXDNTX::writeSilence()
 {
-  q15_t inBuffer[4U] = {0x00U, 0x00U, 0x00U, 0x00U};
+  q15_t inBuffer[4U] = {0, 0, 0, 0};
   q15_t intBuffer[NXDN_RADIO_SYMBOL_LENGTH * 4U];
   q15_t outBuffer[NXDN_RADIO_SYMBOL_LENGTH * 4U];
 
diff --git a/P25TX.cpp b/P25TX.cpp
index 76aba0c..067c5de 100644
--- a/P25TX.cpp
+++ b/P25TX.cpp
@@ -173,7 +173,7 @@ void CP25TX::writeByte(uint8_t c)
 
 void CP25TX::writeSilence()
 {
-  q15_t inBuffer[4U] = {0x00U, 0x00U, 0x00U, 0x00U};
+  q15_t inBuffer[4U] = {0, 0, 0, 0};
   q15_t intBuffer[P25_RADIO_SYMBOL_LENGTH * 4U];
   q15_t outBuffer[P25_RADIO_SYMBOL_LENGTH * 4U];
 
diff --git a/YSFTX.cpp b/YSFTX.cpp
index c2a1a66..444c35f 100644
--- a/YSFTX.cpp
+++ b/YSFTX.cpp
@@ -166,7 +166,7 @@ void CYSFTX::writeByte(uint8_t c)
 
 void CYSFTX::writeSilence()
 {
-  q15_t inBuffer[4U] = {0x00U, 0x00U, 0x00U, 0x00U};
+  q15_t inBuffer[4U] = {0, 0, 0, 0};
   q15_t outBuffer[YSF_RADIO_SYMBOL_LENGTH * 4U];
 
   ::arm_fir_interpolate_q15(&m_modFilter, inBuffer, outBuffer, 4U);