diff --git a/src/gui/Window.cc b/src/gui/Window.cc
index 5cda39a..3f37fc7 100644
--- a/src/gui/Window.cc
+++ b/src/gui/Window.cc
@@ -405,10 +405,8 @@ void Window::resize()
     m_shaders.flat->set_viewport_size(m_width, m_height);
     m_shaders.rect->use();
     m_shaders.rect->set_viewport_size(m_width, m_height);
-    m_columns = m_width / m_font.get_advance();
-    if (m_columns < 1)
-        m_columns = 1;
-    m_rows = (m_height - 2) / m_font.get_line_height();
+    m_columns = std::max(1, m_width / m_font.get_advance());
+    m_rows = std::max(1, (m_height - 2) / m_font.get_line_height());
 }
 
 void Window::redraw()