diff --git a/libgui/src/command-widget.cc b/libgui/src/command-widget.cc
index eb059943e0..79dbfb65d7 100644
--- a/libgui/src/command-widget.cc
+++ b/libgui/src/command-widget.cc
@@ -355,14 +355,18 @@ console::console (command_widget *p)
   setMargins (0);
   setWrapMode (QsciScintilla::WrapWord);
 
-  connect (this, &QsciScintilla::cursorPositionChanged,
-           this, &console::cursor_position_changed);
+  // The following three signal-slot connections must use the old syntax or
+  // they would fail to connect on Windows with warnings like this:
+  // qt.core.qobject.connect: QObject::connect: signal not found in octave::console
 
-  connect (this, &QsciScintilla::textChanged,
-           this, &console::text_changed);
+  connect (this, SIGNAL (cursorPositionChanged (int, int)),
+           this, SLOT (cursor_position_changed (int, int)));
 
-  connect (this, &QsciScintilla::modificationAttempted,
-           this, &console::move_cursor_to_end);
+  connect (this, SIGNAL (textChanged ()),
+           this, SLOT (text_changed ()));
+
+  connect (this, SIGNAL (modificationAttempted ()),
+           this, SLOT (move_cursor_to_end ()));
 
   console_lexer *lexer = new console_lexer ();
   setLexer (lexer);