diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
index 46e423f..8dc0e8f 100644
--- a/IPython/core/interactiveshell.py
+++ b/IPython/core/interactiveshell.py
@@ -2082,6 +2082,7 @@ class InteractiveShell(SingletonConfigurable, Magic):
             with AvoidUNCPath() as path:
                 if path is not None:
                     cmd = '"pushd %s &&"%s' % (path, cmd)
+                cmd = cmd.encode(sys.stdin.encoding)
                 ec = os.system(cmd)
         else:
             ec = os.system(cmd)