diff --git a/.travis.yml b/.travis.yml
index f94e206..1a3dcb5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ install:
  - sudo apt-get install libreadline6-dev
  - sudo apt-get install libssl-dev
  - sudo apt-get install liblua5.2-dev lua5.2
- - sudo apt-get install libevent-dev=1.4.13-stable-1
+ - sudo apt-get install libevent-dev
 
 script:
   - ./configure
diff --git a/event-old.h b/event-old.h
index eef4df3..812c598 100644
--- a/event-old.h
+++ b/event-old.h
@@ -3,6 +3,7 @@
 
 typedef int evutil_socket_t;
   
+static inline struct event *event_new (struct event_base *base, int fd, int what, void(*callback)(int, short, void *), void *arg) __attribute__ ((unused));
 static inline struct event *event_new (struct event_base *base, int fd, int what, void(*callback)(int, short, void *), void *arg) {
   struct event *ev = malloc (sizeof (*ev));  
   event_set (ev, fd, what, callback, arg);
@@ -10,6 +11,7 @@ static inline struct event *event_new (struct event_base *base, int fd, int what
   return ev;
 }
   
+static inline struct event *evtimer_new (struct event_base *base, void(*callback)(int, short, void *), void *arg) __attribute__ ((unused));
 static inline struct event *evtimer_new (struct event_base *base, void(*callback)(int, short, void *), void *arg) {
   struct event *ev = malloc (sizeof (*ev));
   event_set (ev, -1, 0, callback, arg);
@@ -17,6 +19,7 @@ static inline struct event *evtimer_new (struct event_base *base, void(*callback
   return ev;
 }
 
+static void event_free (struct event *ev) __attribute__ ((unused));
 static void event_free (struct event *ev) {
   event_del (ev);
   free (ev);