diff --git a/src/engine/platform/sound/n163/n163.cpp b/src/engine/platform/sound/n163/n163.cpp
index 20853963e..e6801fc1f 100644
--- a/src/engine/platform/sound/n163/n163.cpp
+++ b/src/engine/platform/sound/n163/n163.cpp
@@ -67,6 +67,7 @@
 */
 
 #include "n163.hpp"
+#include <string.h>
 
 void n163_core::tick()
 {
@@ -126,12 +127,12 @@ void n163_core::reset()
 	// reset this chip
 	m_disable = false;
 	m_multiplex = true;
-	std::fill(std::begin(m_ram), std::end(m_ram), 0);
+        memset(m_ram,0,sizeof(m_ram));
 	m_voice_cycle = 0x78;
 	m_addr_latch.reset();
 	m_out = 0;
 	m_acc = 0;
-  std::fill(std::begin(m_ch_out), std::end(m_ch_out), 0);
+        memset(m_ch_out,0,sizeof(m_ch_out));
 }
 
 // accessor
diff --git a/src/engine/platform/sound/scc/scc.cpp b/src/engine/platform/sound/scc/scc.cpp
index 427461e62..b9758fae4 100644
--- a/src/engine/platform/sound/scc/scc.cpp
+++ b/src/engine/platform/sound/scc/scc.cpp
@@ -322,6 +322,7 @@
 */
 
 #include "scc.hpp"
+#include <string.h>
 
 // shared SCC features
 void scc_core::tick()
@@ -372,12 +373,12 @@ void scc_core::reset()
 
 	m_test.reset();
 	m_out = 0;
-	std::fill(std::begin(m_reg), std::end(m_reg), 0);
+        memset(m_reg,0,sizeof(m_reg));
 }
 
 void scc_core::voice_t::reset()
 {
-	std::fill(std::begin(wave), std::end(wave), 0);
+        memset(wave,0,sizeof(wave));
 	enable = false;
 	pitch = 0;
 	volume = 0;
diff --git a/src/engine/platform/sound/vrcvi/vrcvi.cpp b/src/engine/platform/sound/vrcvi/vrcvi.cpp
index bca3ecda3..a6561db80 100644
--- a/src/engine/platform/sound/vrcvi/vrcvi.cpp
+++ b/src/engine/platform/sound/vrcvi/vrcvi.cpp
@@ -81,6 +81,7 @@
 */
 
 #include "vrcvi.hpp"
+#include <string.h>
 
 void vrcvi_core::tick()
 {
@@ -119,7 +120,7 @@ void vrcvi_core::reset()
 	m_timer.reset();
 	m_control.reset();
 	m_out = 0;
-  std::fill(std::begin(m_ch_out),std::end(m_ch_out),0);
+        memset(m_ch_out,0,sizeof(m_ch_out));
 }
 
 bool vrcvi_core::alu_t::tick()