diff --git a/src/CutAndPaste.cpp b/src/CutAndPaste.cpp
index f66153f739..06b60df14d 100644
--- a/src/CutAndPaste.cpp
+++ b/src/CutAndPaste.cpp
@@ -676,15 +676,17 @@ void saveSelection(Cursor & cur)
 	       << to_utf8(cur.selectionAsString(true)) << "'."
 	       << endl;
 
+#if 0
 	// FIXME: The two lines below would allow middle-mouse 
 	// pasting that preserves the LyX formatting when the selection
 	// is internal. They would also allow to use the feature on
 	// Windows and Mac. In the future, we may want to optionally enable
 	// this feature via a rc setting.
-	/*
+	// This is currently disabled because it eats too much resources
+	// while selecting (cf. bug 3877)
 	if (cur.selection())
 		copySelectionToStack(cur, selectionBuffer);
-	*/
+#endif
 
 	// tell X whether we now have a valid selection
 	theSelection().haveSelection(cur.selection());