diff --git a/invoke/terminals.py b/invoke/terminals.py
index 2694712f..c1669a77 100644
--- a/invoke/terminals.py
+++ b/invoke/terminals.py
@@ -107,7 +107,7 @@ def _pty_size() -> Tuple[Optional[int], Optional[int]]:
         # * termios not having a TIOCGWINSZ attribute (happens sometimes...)
         # * other situations where ioctl doesn't explode but the result isn't
         #   something unpack can deal with
-        except (struct.error, TypeError, IOError, AttributeError):
+        except (struct.error, TypeError, IOError, AttributeError, SystemError):
             pass
         return size