diff --git a/include/wx/gtk/window.h b/include/wx/gtk/window.h
index 9ca1202da1..9ec33b88ab 100644
--- a/include/wx/gtk/window.h
+++ b/include/wx/gtk/window.h
@@ -97,6 +97,7 @@ public:
     virtual int GetCharHeight() const wxOVERRIDE;
     virtual int GetCharWidth() const wxOVERRIDE;
     virtual double GetContentScaleFactor() const wxOVERRIDE;
+    virtual double GetDPIScaleFactor() const wxOVERRIDE;
 
     virtual void SetScrollbar( int orient, int pos, int thumbVisible,
                                int range, bool refresh = true ) wxOVERRIDE;
diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 4e33c1ff06..e7c8ecbe39 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -4363,6 +4363,13 @@ double wxWindowGTK::GetContentScaleFactor() const
     return scaleFactor;
 }
 
+double wxWindowGTK::GetDPIScaleFactor() const
+{
+    // Under GTK 3 DPI scale factor is the same as content scale factor, while
+    // under GTK 2 both are always 1, so they're still the same.
+    return GetContentScaleFactor();
+}
+
 void wxWindowGTK::GTKDisableFocusOutEvent()
 {
     g_signal_handlers_block_by_func( m_focusWidget,