1 files changed, 10 insertions, 0 deletions
diff --git a/paramiko/config.py b/paramiko/config.py
index afa74d5d..34720617 100644
--- a/paramiko/config.py
+++ b/paramiko/config.py
@@ -30,6 +30,12 @@ import socket
 
 from .py3compat import StringIO
 
+invoke, invoke_import_error = None, None
+try:
+    import invoke
+except ImportError as e:
+    invoke_import_error = e
+
 from .ssh_exception import CouldNotCanonicalize, ConfigParseError
 
 
@@ -355,6 +361,10 @@ class SSHConfig(object):
                 passed = self._pattern_matches(param, local_username)
                 if self._should_fail(passed, candidate):
                     return False
+            if type_ == "exec":
+                passed = False
+                if self._should_fail(passed, candidate):
+                    return False
             # Made it all the way here? Everything matched!
             matched.append(candidate)
         # Did anything match? (To be treated as bool, usually.)