diff --git a/src/vnet/session/segment_manager.h b/src/vnet/session/segment_manager.h
index fbd9afa..1710b7b 100644
--- a/src/vnet/session/segment_manager.h
+++ b/src/vnet/session/segment_manager.h
@@ -27,6 +27,7 @@
   u32 tx_fifo_size;			/**< transmit fifo size */
   u32 evt_q_size;			/**< event queue length */
   u32 prealloc_fifos;			/**< preallocated fifo pairs */
+  u32 prealloc_fifo_hdrs;		/**< preallocated fifo hdrs */
   uword segment_size;			/**< first segment size */
   uword add_segment_size;		/**< additional segment size */
   u8 add_segment:1;			/**< can add new segments flag */
@@ -159,6 +160,14 @@
 segment_manager_props_t *segment_manager_props_init (segment_manager_props_t *
 						     sm);
 
+static inline void
+segment_manager_parse_segment_handle (u64 segment_handle, u32 * sm_index,
+				      u32 * segment_index)
+{
+  *sm_index = segment_handle >> 32;
+  *segment_index = segment_handle & 0xFFFFFFFF;
+}
+
 #endif /* SRC_VNET_SESSION_SEGMENT_MANAGER_H_ */
 /*
  * fd.io coding-style-patch-verification: ON