diff --git a/src/insets/InsetBox.cpp b/src/insets/InsetBox.cpp
index ea06bfaa3a..b5cdb5a0a2 100644
--- a/src/insets/InsetBox.cpp
+++ b/src/insets/InsetBox.cpp
@@ -162,7 +162,7 @@ void InsetBox::setButtonLabel()
 
 bool InsetBox::hasFixedWidth() const
 {
-	return !params_.width.empty();
+	return !params_.width.empty() && params_.special == "none";
 }
 
 
diff --git a/status.21x b/status.21x
index fd05fd0196..0338da9d47 100644
--- a/status.21x
+++ b/status.21x
@@ -163,6 +163,8 @@ What's new
 - Fix warning about Undo when an empty subscript is automatically deleted in mathed
   (bug 10022).
 
+- Fix on screen narrow box when using \width as box width unit (bug 10048).
+
 * INTERNALS
 
 - Fix parsing problems of class and category declaration line in layout files