diff --git a/include/patty/ax25.h b/include/patty/ax25.h
index acb6130..93f7405 100644
--- a/include/patty/ax25.h
+++ b/include/patty/ax25.h
@@ -32,6 +32,17 @@ enum patty_ax25_sock_status {
 typedef struct _patty_ax25_sock {
     enum patty_ax25_sock_status status;
 
+    time_t timer_ack;
+    time_t timer_response;
+    time_t timer_keepalive;
+
+    int n_maxlen;
+    int n_retry;
+    int n_outstanding;
+
+    int seq_send;
+    int seq_recv;
+
     patty_ax25_if *      iface;
     patty_ax25_address * local;
     patty_ax25_address * remote;
diff --git a/src/Makefile b/src/Makefile
index 1fa89e3..497951e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,7 +1,7 @@
 include ../mk/build.mk
 
 INCLUDE_PATH	= ../include
-HEADER_SUBDIR	= birch
+HEADER_SUBDIR	= patty
 
 CC		= $(CROSS)cc
 CFLAGS		= $(CGFLAGS) -fPIC -Wall -O2 -I$(INCLUDE_PATH)