diff -ur a/src/modules/module_main.h b/src/modules/module_main.h
--- a/src/modules/module_main.h	2022-02-02 04:43:16.910000000 +0000
+++ b/src/modules/module_main.h	2022-02-02 04:43:56.830000000 +0000
@@ -31,6 +31,7 @@
 
 #include <speechd_types.h>
 #include <spd_audio.h>
+#include <sys/types.h>
 
 #ifdef __cplusplus
 extern "C" {