diff --git a/lib/config-mac.h b/lib/config-mac.h
index 0ee185f8f8..4a66edf6b7 100644
--- a/lib/config-mac.h
+++ b/lib/config-mac.h
@@ -52,6 +52,7 @@
 #define HAVE_UTIME_H            1
 #define HAVE_SYS_TIME_H         1
 #define HAVE_SYS_UTIME_H        1
+#define HAVE_SYS_IOCTL_H        1
 
 #define TIME_WITH_SYS_TIME      1