diff --git a/src/engine/platform/sound/oki/msm5232.cpp b/src/engine/platform/sound/oki/msm5232.cpp
index 0aad02af1..83979f66a 100644
--- a/src/engine/platform/sound/oki/msm5232.cpp
+++ b/src/engine/platform/sound/oki/msm5232.cpp
@@ -26,6 +26,13 @@ void msm5232_device::device_start()
 {
 	int rate = m_clock/CLOCK_RATE_DIVIDER;
 
+  o2=0;
+  o4=0;
+  o8=0;
+  o16=0;
+  solo8=0;
+  solo16=0;
+
 	init(m_clock, rate);
 }
 
@@ -528,8 +535,6 @@ void msm5232_device::EG_voices_advance()
 
 }
 
-static int o2,o4,o8,o16,solo8,solo16;
-
 void msm5232_device::TG_group_advance(int groupidx)
 {
 	VOICE *voi = &m_voi[groupidx*4];
diff --git a/src/engine/platform/sound/oki/msm5232.h b/src/engine/platform/sound/oki/msm5232.h
index 641b460ea..9c5c33dd1 100644
--- a/src/engine/platform/sound/oki/msm5232.h
+++ b/src/engine/platform/sound/oki/msm5232.h
@@ -81,6 +81,8 @@ private:
 	int m_noise_rng;
 	int m_noise_clocks;   /* number of the noise_rng (output) level changes */
 
+  int o2,o4,o8,o16,solo8,solo16;
+
 	unsigned int m_UpdateStep;
 
 	/* rate tables */