diff --git a/hwaccess_physmap.c b/hwaccess_physmap.c
index 8ea05cf..5644680 100644
--- a/hwaccess_physmap.c
+++ b/hwaccess_physmap.c
@@ -133,6 +133,7 @@
 {
 }
 #elif defined(__MACH__) && defined(__APPLE__)
+#include <DirectHW/DirectHW.h>
 
 #define MEM_DEV "DirectHW"