--- src/modules/rtaudio/RtAudio.cpp.orig	2021-04-14 02:06:13.000000000 +0800
+++ src/modules/rtaudio/RtAudio.cpp	2024-05-29 06:10:08.000000000 +0800
@@ -46,6 +46,7 @@
 #include <cstring>
 #include <climits>
 #include <algorithm>
+#include <unistd.h>
 
 // Static variable definitions.
 const unsigned int RtApi::MAX_SAMPLE_RATES = 14;