diff --git a/software/sys_controller/pcm1862/pcm1862.c b/software/sys_controller/pcm1862/pcm1862.c
index 5f179a9..9badbd2 100644
--- a/software/sys_controller/pcm1862/pcm1862.c
+++ b/software/sys_controller/pcm1862/pcm1862.c
@@ -18,6 +18,7 @@
 //
 
 #include <stdio.h>
+#include <stdint.h>
 #include <unistd.h>
 #include "system.h"
 #include "i2c_opencores.h"