diff --git a/include/types/applet.h b/include/types/applet.h
index e96b703..b56c563 100644
--- a/include/types/applet.h
+++ b/include/types/applet.h
@@ -71,7 +71,7 @@
 
 	union {
 		struct {
-			void *ptr;              /* multi-purpose pointer for peers */
+			void *ptr;              /* current peer or NULL, do not use for something else */
 		} peers;                        /* used by the peers applet */
 		struct {
 			int connected;
diff --git a/include/types/peers.h b/include/types/peers.h
index a77a094..2fc7435 100644
--- a/include/types/peers.h
+++ b/include/types/peers.h
@@ -67,6 +67,9 @@
 	struct shared_table *remote_table;
 	struct shared_table *last_local_table;
 	struct shared_table *tables;
+#ifdef USE_THREAD
+	HA_SPINLOCK_T lock;	 /* lock used to handle this peer section */
+#endif
 	struct peer *next;	  /* next peer in the list */
 };