diff --git a/lib/qtermwidget.cpp b/lib/qtermwidget.cpp
index 0a7f9df..8532724 100644
--- a/lib/qtermwidget.cpp
+++ b/lib/qtermwidget.cpp
@@ -417,7 +417,7 @@ void QTermWidget::scrollToEnd()
     m_impl->m_terminalDisplay->scrollToEnd();
 }
 
-void QTermWidget::sendText(QString &text)
+void QTermWidget::sendText(const QString &text)
 {
     m_impl->m_session->sendText(text);
 }
diff --git a/lib/qtermwidget.h b/lib/qtermwidget.h
index ada584d..005b71e 100644
--- a/lib/qtermwidget.h
+++ b/lib/qtermwidget.h
@@ -100,7 +100,7 @@ public:
     void scrollToEnd();
 
     // Send some text to terminal
-    void sendText(QString & text);
+    void sendText(const QString & text);
 
     // Sets whether flow control is enabled
     void setFlowControlEnabled(bool enabled);