diff --git a/lib/iser.c b/lib/iser.c
index 4aef52e..898d6b5 100644
--- a/lib/iser.c
+++ b/lib/iser.c
@@ -32,6 +32,20 @@
 #include <semaphore.h>
 #include <poll.h>
 
+
+#ifndef container_of
+/**
+  * 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) \
+    ((type *) ((uint8_t *)(ptr) - offsetof(type, member)))
+#endif
+
+
 #ifdef __linux
 
 /* MUST keep in sync with socket.c */