diff --git a/src/mathed/ChangeLog b/src/mathed/ChangeLog
index db5622f572..560261bfad 100644
--- a/src/mathed/ChangeLog
+++ b/src/mathed/ChangeLog
@@ -1,3 +1,8 @@
+2005-02-14  Angus Leeming  <leeming@lyx.org>
+
+	* math_rootinset.C (idxUpDown): Silence an MSVC compiler warning
+	by making the code more transparent.
+
 2005-02-12  Georg Baum  <Georg.Baum@post.rwth-aachen.de>
 
 	* math_gridinset.C (halign): fix '|' to the right of the last column
diff --git a/src/mathed/math_rootinset.C b/src/mathed/math_rootinset.C
index 646cbfa789..8822ae1bf5 100644
--- a/src/mathed/math_rootinset.C
+++ b/src/mathed/math_rootinset.C
@@ -82,7 +82,7 @@ void MathRootInset::normalize(NormalStream & os) const
 
 bool MathRootInset::idxUpDown(LCursor & cur, bool up) const
 {
-	bool target = !up; // up ? 0 : 1;
+	LCursor::idx_type const target = up ? 0 : 1;
 	if (cur.idx() == target)
 		return false;
 	cur.idx() = target;