diff --git a/module_usb_audio/pdm_mics/pcm_pdm_mic.h b/module_usb_audio/pdm_mics/pcm_pdm_mic.h
new file mode 100644
index 00000000..dccd9ff1
--- /dev/null
+++ b/module_usb_audio/pdm_mics/pcm_pdm_mic.h
@@ -0,0 +1,2 @@
+
+void pcm_pdm_mic(chanend c_pcm_out);