diff --git a/src/richtext/richtextsizepage.cpp b/src/richtext/richtextsizepage.cpp
index 585c88e4da..7ace91a0bb 100644
--- a/src/richtext/richtextsizepage.cpp
+++ b/src/richtext/richtextsizepage.cpp
@@ -116,7 +116,7 @@ wxRichTextSizePage::~wxRichTextSizePage()
     sm_showAlignmentControls = true;
     sm_showFloatingAndAlignmentControls = true;
     sm_showMinMaxSizeControls = true;
-    sm_showMinMaxSizeControls = true;
+    sm_enablePositionAndSizeUnits = true;
     sm_enablePositionAndSizeCheckboxes = true;
     sm_showMoveObjectControls = true;