diff --git a/include/proto/shctx.h b/include/proto/shctx.h
index 13e00c7..594a81d 100644
--- a/include/proto/shctx.h
+++ b/include/proto/shctx.h
@@ -31,7 +31,8 @@
 #endif
 #endif
 
-int shctx_init(struct shared_context **orig_shctx, int maxblocks, int blocksize, int extra, int shared);
+int shctx_init(struct shared_context **orig_shctx,
+               int maxblocks, int blocksize, int maxobjsz, int extra, int shared);
 struct shared_block *shctx_row_reserve_hot(struct shared_context *shctx,
                                            struct shared_block *last, int data_len);
 void shctx_row_inc_hot(struct shared_context *shctx, struct shared_block *first);
diff --git a/include/types/shctx.h b/include/types/shctx.h
index 186f736..53dca3f 100644
--- a/include/types/shctx.h
+++ b/include/types/shctx.h
@@ -40,6 +40,7 @@
 	struct list avail;  /* list for active and free blocks */
 	struct list hot;     /* list for locked blocks */
 	unsigned int nbav;  /* number of available blocks */
+	int max_obj_size;   /* maximum object size. */
 	void (*free_block)(struct shared_block *first, struct shared_block *block);
 	short int block_size;
 	unsigned char data[0];