diff --git a/include/common/defaults.h b/include/common/defaults.h
index 6e5840e..cc1fbbd 100644
--- a/include/common/defaults.h
+++ b/include/common/defaults.h
@@ -83,6 +83,11 @@
 #define MAX_SESS_STKCTR 3
 #endif
 
+// max # of extra stick-table data types that can be registred at runtime
+#ifndef STKTABLE_EXTRA_DATA_TYPES
+#define STKTABLE_EXTRA_DATA_TYPES 0
+#endif
+
 // max # of loops we can perform around a read() which succeeds.
 // It's very frequent that the system returns a few TCP segments at a time.
 #ifndef MAX_READ_POLL_LOOPS
diff --git a/include/proto/stick_table.h b/include/proto/stick_table.h
index a121ad5..a5e7520 100644
--- a/include/proto/stick_table.h
+++ b/include/proto/stick_table.h
@@ -51,6 +51,7 @@
 				        struct session *l4, void *l7, unsigned int opt,
 				        struct sample_expr *expr, struct sample *smp);
 int stktable_compatible_sample(struct sample_expr *expr, unsigned long table_type);
+int stktable_register_data_store(int idx, const char *name, int std_type, int arg_type);
 int stktable_get_data_type(char *name);
 struct proxy *find_stktable(const char *name);
 int stktable_trash_oldest(struct stktable *t, int to_batch);
diff --git a/include/types/stick_table.h b/include/types/stick_table.h
index e28492c..6fdc58e 100644
--- a/include/types/stick_table.h
+++ b/include/types/stick_table.h
@@ -60,7 +60,11 @@
 	STKTABLE_DT_BYTES_IN_RATE,/* bytes rate from client to servers */
 	STKTABLE_DT_BYTES_OUT_CNT,/* cumulated bytes count from servers to client */
 	STKTABLE_DT_BYTES_OUT_RATE,/* bytes rate from servers to client */
-	STKTABLE_DATA_TYPES       /* Number of data types, must always be last */
+	STKTABLE_STATIC_DATA_TYPES,/* number of types above */
+	/* up to STKTABLE_EXTRA_DATA_TYPES types may be registered here, always
+	 * followed by the number of data types, must always be last.
+	 */
+	STKTABLE_DATA_TYPES = STKTABLE_STATIC_DATA_TYPES + STKTABLE_EXTRA_DATA_TYPES
 };
 
 /* The equivalent standard types of the stored data */