diff --git a/src/frontends/qt4/GuiTabular.cpp b/src/frontends/qt4/GuiTabular.cpp
index 1665ad00c2..9e45171a84 100644
--- a/src/frontends/qt4/GuiTabular.cpp
+++ b/src/frontends/qt4/GuiTabular.cpp
@@ -737,7 +737,8 @@ void GuiTabular::updateContents()
 	if (!pwidth.zero()) {
 		colwidth = pwidth.asString();
 		lengthToWidgets(widthED, widthUnit, colwidth, default_unit);
-	}
+	} else
+		widthED->clear();
 
 	// if there is a LaTeX argument, the width and alignment will be overwritten
 	// therefore disable them in this case
diff --git a/status.16x b/status.16x
index 3adb224139..9b9ce37d93 100644
--- a/status.16x
+++ b/status.16x
@@ -130,6 +130,9 @@ What's new
 
 - Do not allow to put the cursor in an InsetInfo. Instead, a context
   menu item is added to facilitate copying of the contents (bug 5446).
+  
+- Clear column width field in the tabular dialog when moving in a column
+  without a fixed width.
 
 - Fix the display of the horizontal alignment of table cells (bug 7007).