diff --git a/src/bitmessageqt/bitmessageui.py b/src/bitmessageqt/bitmessageui.py
index 961fc093..bee8fd57 100644
--- a/src/bitmessageqt/bitmessageui.py
+++ b/src/bitmessageqt/bitmessageui.py
@@ -61,7 +61,8 @@ class Ui_MainWindow(object):
         self.tabWidget.setMinimumSize(QtCore.QSize(0, 0))
         self.tabWidget.setBaseSize(QtCore.QSize(0, 0))
         font = QtGui.QFont()
-        font.setPointSize(9)
+        base_size = QtGui.QApplication.instance().font().pointSize()
+        font.setPointSize(int(base_size * 0.75))
         self.tabWidget.setFont(font)
         self.tabWidget.setTabPosition(QtGui.QTabWidget.North)
         self.tabWidget.setTabShape(QtGui.QTabWidget.Rounded)