diff --git a/include/net/ipcomp.h b/include/net/ipcomp.h
new file mode 100644
index 0000000..e651a57
--- /dev/null
+++ b/include/net/ipcomp.h
@@ -0,0 +1,11 @@
+#ifndef _NET_IPCOMP_H
+#define _NET_IPCOMP_H
+
+#define IPCOMP_SCRATCH_SIZE     65400
+
+struct ipcomp_data {
+	u16 threshold;
+	struct crypto_tfm **tfms;
+};
+
+#endif