diff --git a/interface/wx/display.h b/interface/wx/display.h
index 4a9ac5ca65..02a914ff68 100644
--- a/interface/wx/display.h
+++ b/interface/wx/display.h
@@ -148,6 +148,13 @@ public:
     */
     wxString GetName() const;
 
+    /**
+        Returns display depth, i.e. number of bits per pixel (0 if unknown)
+
+        @since 3.1.2
+    */
+    int GetDepth() const;
+
     /**
         Returns display resolution in pixels per inch.