diff --git a/src/univ/themes/gtk.cpp b/src/univ/themes/gtk.cpp
index e0fd1f8fe1..b057da0efd 100644
--- a/src/univ/themes/gtk.cpp
+++ b/src/univ/themes/gtk.cpp
@@ -368,8 +368,6 @@ protected:
     }
 
 private:
-    const wxColourScheme *m_scheme;
-
     // data
     wxSize m_sizeScrollbarArrow;