diff --git a/container_of.h b/container_of.h
new file mode 100644
index 0000000..a0e181a
--- /dev/null
+++ b/container_of.h
@@ -0,0 +1,9 @@
+#ifndef _CONTAINER_OF_H
+#define _CONTAINER_OF_H
+
+#ifndef container_of
+#define container_of(ptr, type, member)                                        \
+    (type *)((char *)(ptr) - (char *)&((type *)0)->member)
+#endif
+
+#endif