diff --git a/emailtunnel/__init__.py b/emailtunnel/__init__.py
index 8802472..fd88278 100644
--- a/emailtunnel/__init__.py
+++ b/emailtunnel/__init__.py
@@ -107,7 +107,7 @@ def _sanity_log_invalid(self, message):
             basename = os.path.join(dirname, now_string())
             try:
                 os.mkdir(dirname)
-            except FileExistsError:
+            except OSError:
                 pass
             with open(basename + '.in', 'ab') as fp:
                 fp.write(message)