diff --git a/module_usb_audio/audio_io/audio_io.xc b/module_usb_audio/audio_io/audio_io.xc
index b685b508..e29471d6 100755
--- a/module_usb_audio/audio_io/audio_io.xc
+++ b/module_usb_audio/audio_io/audio_io.xc
@@ -101,8 +101,8 @@ extern buffered in port:32  p_i2s_adc[I2S_WIRES_ADC];
 extern buffered out port:32 p_lrclk;
 extern buffered out port:32 p_bclk;
 #else
-extern in port p_lrclk;
-extern in port p_bclk;
+extern buffered in port:32 p_lrclk;
+extern buffered in port:32 p_bclk;
 #endif
 
 unsigned dsdMode = DSD_MODE_OFF;
diff --git a/module_usb_audio/main.xc b/module_usb_audio/main.xc
index 6718f071..59fbde34 100755
--- a/module_usb_audio/main.xc
+++ b/module_usb_audio/main.xc
@@ -116,8 +116,8 @@ on tile[AUDIO_IO_TILE] : buffered in port:32 p_i2s_adc[I2S_WIRES_ADC] =
 on tile[AUDIO_IO_TILE] : buffered out port:32 p_lrclk       = PORT_I2S_LRCLK;
 on tile[AUDIO_IO_TILE] : buffered out port:32 p_bclk        = PORT_I2S_BCLK;
 #else
-on tile[AUDIO_IO_TILE] : in port p_lrclk                    = PORT_I2S_LRCLK;
-on tile[AUDIO_IO_TILE] : in port p_bclk                     = PORT_I2S_BCLK;
+on tile[AUDIO_IO_TILE] : buffered in port:32 p_lrclk        = PORT_I2S_LRCLK;
+on tile[AUDIO_IO_TILE] : buffered in port:32 p_bclk         = PORT_I2S_BCLK;
 #endif
 
 on tile[AUDIO_IO_TILE] : port p_mclk_in                     = PORT_MCLK_IN;
diff --git a/module_usb_audio/ports/audioports.h b/module_usb_audio/ports/audioports.h
index fb44d455..5bbc4b28 100644
--- a/module_usb_audio/ports/audioports.h
+++ b/module_usb_audio/ports/audioports.h
@@ -70,8 +70,8 @@ void ConfigAudioPortsWrapper(
                 buffered out port:32 ?p_lrclk,
                 buffered out port:32 p_bclk,
 #else
-                in port ?p_lrclk,
-                in port p_bclk,
+                buffered in port:32 ?p_lrclk,
+                buffered in port:32 p_bclk,
 #endif
 #endif
                 unsigned int divide, unsigned curSamFreq, unsigned int dsdMode);