diff --git a/src/vnet/ipsec/esp.h b/src/vnet/ipsec/esp.h
index 8f7f8fa..73d4326 100644
--- a/src/vnet/ipsec/esp.h
+++ b/src/vnet/ipsec/esp.h
@@ -44,6 +44,14 @@
 
 /* *INDENT-OFF* */
 typedef CLIB_PACKED (struct {
+  ip4_header_t ip4;
+  udp_header_t udp;
+  esp_header_t esp;
+}) ip4_and_udp_and_esp_header_t;
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
   ip6_header_t ip6;
   esp_header_t esp;
 }) ip6_and_esp_header_t;