diff --git a/linux/obc/PtmeIF.h b/linux/obc/PtmeIF.h
index 7108df05..5488fbfb 100644
--- a/linux/obc/PtmeIF.h
+++ b/linux/obc/PtmeIF.h
@@ -3,6 +3,8 @@
 
 #include "fsfw/returnvalues/HasReturnvaluesIF.h"
 
+#include <cstddef>
+
 /**
  * @brief   Interface class for managing the PTME IP Core implemented in the programmable logic.
  *