diff --git a/src/singleinstance.py b/src/singleinstance.py
index c1e20c4b..19ffc7cc 100644
--- a/src/singleinstance.py
+++ b/src/singleinstance.py
@@ -55,7 +55,9 @@ class singleinstance(object):
                 )
             except OSError as e:
                 if e.errno == 13:
-                    sys.exit('Another instance of this application is already running')
+                    sys.exit(
+                        'Another instance of this application is'
+                        ' already running')
                 raise
             else:
                 pidLine = "%i\n" % self.lockPid
@@ -70,7 +72,9 @@ class singleinstance(object):
                     fcntl.lockf(self.fp, fcntl.LOCK_EX | fcntl.LOCK_NB)
                 self.lockPid = os.getpid()
             except IOError:
-                sys.exit('Another instance of this application is already running')
+                sys.exit(
+                    'Another instance of this application is'
+                    ' already running')
             else:
                 pidLine = "%i\n" % self.lockPid
                 self.fp.truncate(0)