diff --git a/src/fs_sendfile_unsupported.icpp b/src/fs_sendfile_unsupported.icpp
index 87af18fd..853c9b99 100644
--- a/src/fs_sendfile_unsupported.icpp
+++ b/src/fs_sendfile_unsupported.icpp
@@ -15,6 +15,7 @@
 */
 
 #include <errno.h>
+#include <sys/types.h>
 
 namespace fs
 {
diff --git a/src/xattr.hpp b/src/xattr.hpp
index 07f8b03a..98f5c0ec 100644
--- a/src/xattr.hpp
+++ b/src/xattr.hpp
@@ -18,10 +18,18 @@
 #include <attr/xattr.h>
 #endif
 
-#ifndef ENOATTR
+#if defined(ENODATA) && !defined(ENOATTR)
 #define ENOATTR ENODATA
 #endif
 
+#if defined(ENOATTR) && !defined(ENODATA)
+#define ENODATA ENOATTR
+#endif
+
+#if !defined(ENOATTR) && !defined(ENODATA)
+#error "Neither ENOATTR or ENODATA defined: please contact mergerfs author with platform information"
+#endif
+
 #ifndef XATTR_CREATE
 #define XATTR_CREATE 0x1
 #endif