diff --git a/git_config.py b/git_config.py
index 53b52c8..4526461 100644
--- a/git_config.py
+++ b/git_config.py
@@ -346,7 +346,7 @@
 
   if not _ssh_master \
   or 'GIT_SSH' in os.environ \
-  or sys.platform == 'win32':
+  or sys.platform in ('win32', 'cygwin'):
     # failed earlier, or cygwin ssh can't do this
     #
     return False