diff --git a/module_usb_audio/usb_buffer/decouple.xc b/module_usb_audio/usb_buffer/decouple.xc
index 2cae8e87..d683508e 100644
--- a/module_usb_audio/usb_buffer/decouple.xc
+++ b/module_usb_audio/usb_buffer/decouple.xc
@@ -723,13 +723,12 @@ void decouple(chanend c_mix_out
             /* Check for freq change or other update */
 
             GET_SHARED_GLOBAL(tmp, g_freqChange_flag);
-#if MIN_FREQ != MAX_FREQ
+#if (MIN_FREQ != MAX_FREQ)
             if (tmp == SET_SAMPLE_FREQ)
             {
                 SET_SHARED_GLOBAL(g_freqChange_flag, 0);
                 GET_SHARED_GLOBAL(sampFreq, g_freqChange_sampFreq);
 
-
                 /* Pass on to mixer */
                 DISABLE_INTERRUPTS();
                 inuint(c_mix_out);
diff --git a/module_usb_audio/usb_buffer/usb_buffer.xc b/module_usb_audio/usb_buffer/usb_buffer.xc
index 10026471..754f9e55 100644
--- a/module_usb_audio/usb_buffer/usb_buffer.xc
+++ b/module_usb_audio/usb_buffer/usb_buffer.xc
@@ -310,7 +310,7 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in,
                 {
                     unsigned cmd = inuint(c_aud_ctl);
 
-#if MAX_FREQ != MIN_FREQ
+#if (MAX_FREQ != MIN_FREQ)
                     if(cmd == SET_SAMPLE_FREQ)
                     {
                         unsigned receivedSampleFreq = inuint(c_aud_ctl);