diff --git a/mobile-widgets/themeinterface.cpp b/mobile-widgets/themeinterface.cpp
index 9e522b936..28de58828 100644
--- a/mobile-widgets/themeinterface.cpp
+++ b/mobile-widgets/themeinterface.cpp
@@ -85,7 +85,7 @@ void ThemeInterface::set_currentScale(double newScale)
 	}
 
 	// Set current font size
-	defaultModelFont().setPointSize(m_basePointSize * qPrefDisplay::mobile_scale());
+	defaultModelFont().setPointSizeF(m_basePointSize * qPrefDisplay::mobile_scale());
 
 	// adjust all used font sizes
 	m_regularPointSize = m_basePointSize * qPrefDisplay::mobile_scale();