diff --git a/src/ChangeLog b/src/ChangeLog
index 8c0e5b80cf..d89b25609b 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2007-04-05  Jean-Marc Lasgouttes  <lasgouttes@lyx.org>
+
+	* lyxlayout.C (Read): set labelstringappendix_ every time
+	labelstring is set (instead of using this value only as a
+	fallback) (bug 3351)
+
 2007-03-20  Martin Vermeer <martin.vermeer@tkk.fi>
 
 	* bufferparams.[Ch]: move getEngine() here, and let it sense the
diff --git a/src/lyxlayout.C b/src/lyxlayout.C
index 1e77971b87..5bfa69ccbe 100644
--- a/src/lyxlayout.C
+++ b/src/lyxlayout.C
@@ -447,8 +447,10 @@ bool LyXLayout::Read(LyXLex & lexrc, LyXTextClass const & tclass)
 			break;
 
 		case LT_LABELSTRING:	// label string definition
-			if (lexrc.next())
+			if (lexrc.next()) {
 				labelstring_ = trim(lexrc.getString());
+				labelstring_appendix_ = labelstring_;
+			}
 			break;
 
 		case LT_ENDLABELSTRING:	// endlabel string definition
@@ -483,8 +485,6 @@ bool LyXLayout::Read(LyXLex & lexrc, LyXTextClass const & tclass)
 	}
 	lexrc.popTable();
 
-	if (labelstring_appendix_.empty())
-		labelstring_appendix_ = labelstring_;
 	return error;
 }
 
diff --git a/status.14x b/status.14x
index 2fb9aa8467..95881371b5 100644
--- a/status.14x
+++ b/status.14x
@@ -49,6 +49,8 @@ What's new
 - Make it possible to reset itemize bullets to their original state
   (bug 3312).
 
+- Fix display of Theorem-like environments when in appendix (bug 3351)
+
 - Fix display of math root inset when the exponent contains large
   things (bug 3295).