diff --git a/flight/PiOS.osx/inc/pios_struct_helper.h b/flight/PiOS.osx/inc/pios_struct_helper.h
new file mode 100644
index 000000000..6196d9b26
--- /dev/null
+++ b/flight/PiOS.osx/inc/pios_struct_helper.h
@@ -0,0 +1,12 @@
+/* Taken from include/linux/kernel.h from the Linux kernel tree */
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr:	the pointer to the member.
+ * @type:	the type of the container struct this is embedded in.
+ * @member:	the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({			\
+	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
+	(type *)( (char *)__mptr - offsetof(type,member) );})