diff --git a/src/ChangeLog b/src/ChangeLog
index 9f7913d402..747c2561d4 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2005-07-01  Jürgen Spitzmüller  <j.spitzmueller@gmx.de>
+
+	* dociterator.[Ch]: implement operator==(StableDocIterator const &, 
+	StableDocIterator const &)
+	* undo.C (recordUndo): use the above instead of cell.size() comparison
+	(fixes bug 1808; instructed by André).
 
 2005-06-29  Martin Vermeer  <martin.vermeer@hut.fi>
 
diff --git a/src/dociterator.C b/src/dociterator.C
index 53a0d2ebc7..596a0a119f 100644
--- a/src/dociterator.C
+++ b/src/dociterator.C
@@ -540,3 +540,10 @@ std::ostream & operator<<(std::ostream & os, StableDocIterator const & dit)
 		os << " " << dit.data_[i] << "\n";
 	return os;
 }
+
+
+bool operator==(StableDocIterator const & dit1, StableDocIterator const & dit2)
+{
+	return dit1.data_ == dit2.data_;
+}
+
diff --git a/src/dociterator.h b/src/dociterator.h
index 33fd32cab3..9106f8dde9 100644
--- a/src/dociterator.h
+++ b/src/dociterator.h
@@ -267,10 +267,11 @@ public:
 	///
 	friend std::istream &
 	operator>>(std::istream & is, StableDocIterator & cur);
+	///
+	friend bool
+	operator==(StableDocIterator const &, StableDocIterator const &);
 private:
 	std::vector<CursorSlice> data_;
 };
 
-bool operator==(StableDocIterator const &, StableDocIterator const &);
-
 #endif
diff --git a/src/undo.C b/src/undo.C
index 1517cf6360..bb600dd118 100644
--- a/src/undo.C
+++ b/src/undo.C
@@ -73,7 +73,7 @@ void recordUndo(Undo::undo_kind kind,
 	if (!undo_finished
 	    && kind != Undo::ATOMIC
 	    && !stack.empty()
-	    && stack.top().cell.size() == undo.cell.size()
+	    && stack.top().cell == undo.cell
 		  && stack.top().kind == undo.kind
 		  && stack.top().from == undo.from
 		  && stack.top().end == undo.end)