diff --git a/libraries/AP_Common/missing/cstddef b/libraries/AP_Common/missing/cstddef
new file mode 100644
index 0000000000..a7d1912072
--- /dev/null
+++ b/libraries/AP_Common/missing/cstddef
@@ -0,0 +1,9 @@
+#pragma once
+
+#include_next <cstddef>
+
+#if defined(HAVE_NULLPTR_T) && !HAVE_NULLPTR_T
+namespace std {
+    typedef decltype(nullptr) nullptr_t;
+}
+#endif