1 files changed, 4 insertions, 2 deletions
diff --git a/zix/sem.h b/zix/sem.h
index 1fea796..67e3c52 100644
--- a/zix/sem.h
+++ b/zix/sem.h
@@ -17,6 +17,10 @@
 #ifndef ZIX_SEM_H
 #define ZIX_SEM_H
 
+#include "zix/common.h"
+
+#include <stdbool.h>
+
 #ifdef __APPLE__
 #    include <mach/mach.h>
 #elif defined(_WIN32)
@@ -27,8 +31,6 @@
 #    include <errno.h>
 #endif
 
-#include "zix/common.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif