diff --git a/src/util/u_thread.h b/src/util/u_thread.h
index 7411140fcb0..8eab3a5b94a 100644
--- a/src/util/u_thread.h
+++ b/src/util/u_thread.h
@@ -27,6 +27,8 @@
 #ifndef U_THREAD_H_
 #define U_THREAD_H_
 
+#include <stdint.h>
+
 #include "c11/threads.h"
 
 #ifdef HAVE_PTHREAD