diff --git a/matrix/helper_functions.hpp b/matrix/helper_functions.hpp
index e8cc0dcb80..dffd9e0020 100644
--- a/matrix/helper_functions.hpp
+++ b/matrix/helper_functions.hpp
@@ -2,6 +2,10 @@
 
 #include "math.hpp"
 
+#if defined (__PX4_NUTTX) || defined (__PX4_QURT)
+#include <px4_defines.h>
+#endif
+
 namespace matrix
 {