diff --git a/py65/monitor.py b/py65/monitor.py
index 9f8226d..6ea44a4 100644
--- a/py65/monitor.py
+++ b/py65/monitor.py
@@ -70,7 +70,7 @@ class Monitor(cmd.Cmd):
             self._reset(self.mpu_type, self.getc_addr, self.putc_addr)
 
             if load is not None:
-                self.do_load(load)
+                self.do_load("%r" % load)
 
             if goto is not None:
                 self.do_goto(goto)