diff --git a/lib/native/windows-64/jportaudio.dll b/lib/native/windows-64/jportaudio.dll
index e9ce0363a..ea4d50abf 100644
Binary files a/lib/native/windows-64/jportaudio.dll and b/lib/native/windows-64/jportaudio.dll differ
diff --git a/lib/native/windows/jportaudio.dll b/lib/native/windows/jportaudio.dll
index 19b4f8119..8da991f29 100644
Binary files a/lib/native/windows/jportaudio.dll and b/lib/native/windows/jportaudio.dll differ
diff --git a/src/native/portaudio/AudioQualityImprovement.c b/src/native/portaudio/AudioQualityImprovement.c
index 157f29d6c..dfaf55057 100644
--- a/src/native/portaudio/AudioQualityImprovement.c
+++ b/src/native/portaudio/AudioQualityImprovement.c
@@ -38,8 +38,7 @@ static void AudioQualityImprovement_updatePreprocess
 static pthread_mutex_t AudioQualityImprovement_sharedInstancesMutex
     = PTHREAD_MUTEX_INITIALIZER;
 #else /* Windows */
-static CRITICAL_SECTION AudioQualityImprovement_sharedInstancesMutex = {0};
-static int initialized = 0;
+static CRITICAL_SECTION AudioQualityImprovement_sharedInstancesMutex = {(void*)-1, -1, 0, 0, 0, 0};
 #endif
 
 static AudioQualityImprovement *AudioQualityImprovement_sharedInstances
@@ -104,14 +103,6 @@ AudioQualityImprovement_getSharedInstance(const char *stringID, jlong longID)
 {
     AudioQualityImprovement *theSharedInstance = NULL;
 
-#ifdef _WIN32
-    if(!initialized)
-    {
-        mutex_init(&AudioQualityImprovement_sharedInstancesMutex, NULL);
-        initialized = 1;
-    }
-#endif
-
     if (!mutex_lock(&AudioQualityImprovement_sharedInstancesMutex))
     {
         AudioQualityImprovement *aSharedInstance