diff --git a/changelog.md b/changelog.md
index c73a6528a358..a310029f3c3e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -57,6 +57,7 @@
    * Set the correct default text color for in-game UI elements instead of #ffffff white for consistency with other UI elements.
    * Increased font sizes in Help and some legacy UI elements.
    * Minor clean-up of game menus display.
+   * Fixed missing display resolution ratios in Preferences -> Display (regression introduced in 1.15.10).
  ### WML Engine
    * Standard Location Filters now support gives_income=yes|no to make it simpler to match villages regardless of owner
    * Fixed ThemeWML `[label] font_rgb=` generating text elements with broken UTF-8 sequences.
diff --git a/src/gui/dialogs/preferences_dialog.cpp b/src/gui/dialogs/preferences_dialog.cpp
index dc86a78266ce..dc106fccb6b2 100644
--- a/src/gui/dialogs/preferences_dialog.cpp
+++ b/src/gui/dialogs/preferences_dialog.cpp
@@ -135,7 +135,7 @@ void preferences_dialog::set_resolution_list(menu_button& res_list)
 		config option;
 		option["label"] = formatter() << res.x << font::unicode_multiplication_sign << res.y;
 
-		const int div = std::gcd(12, 4);
+		const int div = std::gcd(res.x, res.y);
 		const int x_ratio = res.x / div;
 		const int y_ratio = res.y / div;