diff --git a/src/frontends/qt4/GuiTabular.cpp b/src/frontends/qt4/GuiTabular.cpp
index f9ae5527ca..990dc2d32a 100644
--- a/src/frontends/qt4/GuiTabular.cpp
+++ b/src/frontends/qt4/GuiTabular.cpp
@@ -701,7 +701,7 @@ void GuiTabular::paramsToDialog(Inset const * inset)
 	if (tabwidth.zero())
 		tabularWidthED->clear();
 	else
-		lengthToWidgets(widthED, widthUnitCB,
+		lengthToWidgets(tabularWidthED, tabularWidthUnitCB,
 			tabwidth.asString(), default_unit);
 
 	Length pwidth;