diff --git a/core/utils/processes.py b/core/utils/processes.py
index 23bb7a92..56882757 100644
--- a/core/utils/processes.py
+++ b/core/utils/processes.py
@@ -54,7 +54,7 @@ class PosixProcess(object):
             self.lasterror = False
             return self.lasterror
         except socket.error as e:
-            if 'Address already in use' in e:
+            if 'Address already in use' in str(e):
                 self.lasterror = True
                 return self.lasterror
         except AttributeError: