diff --git a/module_usb_audio/audio_io/audio_io.xc b/module_usb_audio/audio_io/audio_io.xc
index 3590f491..a804857b 100755
--- a/module_usb_audio/audio_io/audio_io.xc
+++ b/module_usb_audio/audio_io/audio_io.xc
@@ -430,7 +430,7 @@ unsigned static deliver(chanend c_out, chanend ?c_spd_out,
 #if (NUM_PDM_MICS > 0)
     chanend c_pdm_pcm,
 #endif
-    chanend ?unused, 
+    chanend ?unused,
     client audManage_if i_audMan)
 {
 
diff --git a/module_usb_audio/endpoint0/vendorrequests.c b/module_usb_audio/endpoint0/vendorrequests.c
index cfb3c63d..e9361702 100644
--- a/module_usb_audio/endpoint0/vendorrequests.c
+++ b/module_usb_audio/endpoint0/vendorrequests.c
@@ -28,6 +28,6 @@ void VendorRequests_Init(VENDOR_REQUESTS_PARAMS_DEC) __attribute__ ((weak));
 
 void VendorRequests_Init(VENDOR_REQUESTS_PARAMS_DEC)
 {
-    
+
 }
 
diff --git a/module_usb_audio/pdm_mics/pdm_mic.xc b/module_usb_audio/pdm_mics/pdm_mic.xc
index 88d28995..6bc4ab83 100644
--- a/module_usb_audio/pdm_mics/pdm_mic.xc
+++ b/module_usb_audio/pdm_mics/pdm_mic.xc
@@ -126,7 +126,7 @@ void pdm_buffer(streaming chanend c_ds_output[2], chanend c_audio)
         select
         {
             case c_audio :> req:
-                
+
                 /* Audio IO core requests samples */
                 if(req)
                 unsafe{