diff --git a/src/Backends/Audio/SoftwareMixer/Solaris.cpp b/src/Backends/Audio/SoftwareMixer/Solaris.cpp
index 02e014a4..23f47d39 100644
--- a/src/Backends/Audio/SoftwareMixer/Solaris.cpp
+++ b/src/Backends/Audio/SoftwareMixer/Solaris.cpp
@@ -20,6 +20,9 @@
 static const int bufferSize = 300;
 static const int samplingRate = 8000;
 
+static pthread_mutex_t mixerMutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t organyaMutex = PTHREAD_MUTEX_INITIALIZER;
+
 static int buffersWritten = 0;
 static int sndfp;
 static FILE* sndfile;
@@ -118,6 +121,9 @@ unsigned long SoftwareMixerBackend_Init(void (*callback)(long *stream, size_t fr
     audioInfo.play = info;
     ioctl(sndfp, AUDIO_SETINFO, &audioInfo);
 
+    pthread_mutex_init(&mixerMutex, NULL);
+    pthread_mutex_init(&organyaMutex, NULL);
+
     pthread_t thread;
     pthread_attr_t thread_attr;
     pthread_attr_init(&thread_attr);
@@ -136,13 +142,17 @@ bool SoftwareMixerBackend_Start(void) {
 }
 
 void SoftwareMixerBackend_LockMixerMutex(void) {
+    pthread_mutex_lock(&mixerMutex);
 }
 
 void SoftwareMixerBackend_UnlockMixerMutex(void) {
+    pthread_mutex_unlock(&mixerMutex);
 }
 
 void SoftwareMixerBackend_LockOrganyaMutex(void) {
+    pthread_mutex_lock(&organyaMutex);
 }
 
 void SoftwareMixerBackend_UnlockOrganyaMutex(void) {
+    pthread_mutex_unlock(&organyaMutex);
 }