diff --git a/chaperone/cproc/process_manager.py b/chaperone/cproc/process_manager.py
index 0ac74e7..9726557 100644
--- a/chaperone/cproc/process_manager.py
+++ b/chaperone/cproc/process_manager.py
@@ -223,7 +223,7 @@ def kill_system(self, errno = None, force = False):
         elif self._killing_system:
             return
 
-        if self._exitcode is None and errno is not None:
+        if self._exitcode is None and errno != 0:
             self._exitcode = 1   # default exit for an error
             self.notify.error(errno)
 
diff --git a/chaperone/cproc/version.py b/chaperone/cproc/version.py
index 1ee4fbb..6fc5f33 100644
--- a/chaperone/cproc/version.py
+++ b/chaperone/cproc/version.py
@@ -1,7 +1,7 @@
 # This file is designed to be used as a package module, but also as a main program runnable
 # by Python2 or Python3 which will print the version.  Used in setup.py
 
-VERSION = (0,3,12)
+VERSION = (0,3,13)
 DISPLAY_VERSION = ".".join([str(v) for v in VERSION])
 
 LICENSE = "Apache License, Version 2.0"