diff --git a/lib/PeerSync.js b/lib/PeerSync.js
index ba0d743..4fe2248 100644
--- a/lib/PeerSync.js
+++ b/lib/PeerSync.js
@@ -106,11 +106,11 @@ function spec() {
     });
 
     peerman.on('connection', function(conn) {
-      conn.on('inv', function(x){self.handle_inv(x);});
-      conn.on('block', function(x){self.handle_block(x);});
-      conn.on('tx', function(x){self.handle_tx(x);});
+      conn.on('inv', self.handle_inv.bind(self));
+      conn.on('block', self.handle_block.bind(self));
+      conn.on('tx', self.handle_tx.bind(self));
     });
-    peerman.on('connect', function(x){self.handle_connected(x);});
+    peerman.on('connect', self.handle_connected.bind(self));
 
     peerman.start();
   };