diff --git a/panda/src/vrpn/vrpnClient.I b/panda/src/vrpn/vrpnClient.I
index 9e80a3bfde..a0b22dae8d 100644
--- a/panda/src/vrpn/vrpnClient.I
+++ b/panda/src/vrpn/vrpnClient.I
@@ -25,7 +25,7 @@ get_server_name() const {
 ////////////////////////////////////////////////////////////////////
 INLINE bool VrpnClient::
 is_valid() const {
-  return _connection->doing_okay();
+  return (_connection->doing_okay() != 0);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -36,7 +36,7 @@ is_valid() const {
 ////////////////////////////////////////////////////////////////////
 INLINE bool VrpnClient::
 is_connected() const {
-  return _connection->connected();
+  return (_connection->connected() != 0);
 }
 
 
diff --git a/panda/src/vrpn/vrpn_interface.h b/panda/src/vrpn/vrpn_interface.h
index 1be2e3a055..1954fa59e0 100644
--- a/panda/src/vrpn/vrpn_interface.h
+++ b/panda/src/vrpn/vrpn_interface.h
@@ -25,4 +25,8 @@
 #include <vrpn_Button.h>
 #include <vrpn_Dial.h>
 
+#ifdef sleep
+#undef sleep
+#endif
+
 #endif