diff --git a/common/JackConstants.h b/common/JackConstants.h
index 6d7cb478..59f6b6d2 100644
--- a/common/JackConstants.h
+++ b/common/JackConstants.h
@@ -24,7 +24,7 @@
 #include "config.h"
 #endif
 
-#define VERSION "1.9.9.4"
+#define VERSION "1.9.9.5"
 
 #define BUFFER_SIZE_MAX 8192
 
diff --git a/windows/portaudio/JackPortAudioDriver.cpp b/windows/portaudio/JackPortAudioDriver.cpp
index ba197e28..2c6c6098 100644
--- a/windows/portaudio/JackPortAudioDriver.cpp
+++ b/windows/portaudio/JackPortAudioDriver.cpp
@@ -184,7 +184,7 @@ int JackPortAudioDriver::Open(jack_nframes_t buffer_size,
     }
     
     // If ASIO, request for preferred size (assuming fInputDevice and fOutputDevice are the same)
-    if (buffer_size == -1) { 
+    if (buffer_size == 0) { 
         buffer_size = fPaDevices->GetPreferredBufferSize(fInputDevice);
         jack_log("JackPortAudioDriver::Open preferred buffer_size = %d", buffer_size);
     }
@@ -368,7 +368,7 @@ extern "C"
         jack_driver_descriptor_add_parameter(desc, &filler, "rate", 'r', JackDriverParamUInt, &value, NULL, "Sample rate", NULL);
 
         value.ui = 512U;
-        jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", "Frames per period. If -1 and ASIO drver, will take preferred value");
+        jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", "Frames per period. If 0 and ASIO driver, will take preferred value");
 
         jack_driver_descriptor_add_parameter(desc, &filler, "device", 'd', JackDriverParamString, &value, NULL, "PortAudio device name", NULL);