diff --git a/gui/codeeditor.cpp b/gui/codeeditor.cpp
index e53a60e51..3c48d83e1 100644
--- a/gui/codeeditor.cpp
+++ b/gui/codeeditor.cpp
@@ -194,6 +194,7 @@ CodeEditor::CodeEditor(QWidget *parent) :
     QFont font("Monospace");
     font.setStyleHint(QFont::TypeWriter);
     setFont(font);
+    mLineNumberArea->setFont(font);
 
     // set widget coloring by overriding widget style sheet
     setObjectName("CodeEditor");