diff --git a/aider/io.py b/aider/io.py
index c96f65d9a..43c4eb931 100644
--- a/aider/io.py
+++ b/aider/io.py
@@ -7,6 +7,8 @@ from prompt_toolkit.completion import Completer, Completion
 from prompt_toolkit.history import FileHistory
 from prompt_toolkit.lexers import PygmentsLexer
 from prompt_toolkit.shortcuts import CompleteStyle, PromptSession, prompt
+from prompt_toolkit.keys import Keys
+from prompt_toolkit.key_binding import KeyBindings
 from prompt_toolkit.styles import Style
 from pygments.lexers import MarkdownLexer, guess_lexer_for_filename
 from pygments.token import Token
@@ -203,7 +205,13 @@ class InputOutput:
             if self.input_history_file is not None:
                 session_kwargs["history"] = FileHistory(self.input_history_file)
 
-            session = PromptSession(**session_kwargs)
+            kb = KeyBindings()
+
+            @kb.add(Keys.ControlJ, eager=True)
+            def _(event):
+                event.current_buffer.insert_text('\n')
+
+            session = PromptSession(key_bindings=kb, **session_kwargs)
             line = session.prompt()
 
             if line and line[0] == "{" and not multiline_input: