diff --git a/mitogen/core.py b/mitogen/core.py
index b6936a40..53f32bb0 100644
--- a/mitogen/core.py
+++ b/mitogen/core.py
@@ -694,7 +694,7 @@ class Importer(object):
 
             suffix = fullname[len(pkgname+dot):]
             if pkgname and suffix not in self._present.get(pkgname, ()):
-                _v and LOG.debug('%r: master doesn\'t know %r', self, fullname)
+                LOG.debug('%r: master doesn\'t know %r', self, fullname)
                 return None
 
             # #114: explicitly whitelisted prefixes override any
@@ -1396,7 +1396,7 @@ class Latch(object):
                 wsock, cookie = self._sleeping[self._waking]
                 self._waking += 1
                 _vv and IOLOG.debug('%r.put() -> waking wfd=%r',
-                                    self, sock.fileno())
+                                    self, wsock.fileno())
                 self._wake(wsock, cookie)
         finally:
             self._lock.release()
diff --git a/mitogen/service.py b/mitogen/service.py
index 38f7ad9b..8af02d0e 100644
--- a/mitogen/service.py
+++ b/mitogen/service.py
@@ -778,7 +778,7 @@ class FileService(Service):
 
         st = os.stat(path)
         if not stat.S_ISREG(st.st_mode):
-            raise IOError('%r is not a regular file.' % (in_path,))
+            raise IOError('%r is not a regular file.' % (path,))
 
         LOG.debug('%r: registering %r', self, path)
         self._metadata_by_path[path] = {
@@ -920,7 +920,7 @@ class FileService(Service):
         :param mitogen.core.Context context:
             Reference to the context hosting the FileService that will be used
             to fetch the file.
-        :param bytes in_path:
+        :param bytes path:
             FileService registered name of the input file.
         :param bytes out_path:
             Name of the output path on the local disk.