Index: trunk/src/org/openstreetmap/josm/io/GeoJSONWriter.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/GeoJSONWriter.java	(revision 5303)
+++ trunk/src/org/openstreetmap/josm/io/GeoJSONWriter.java	(revision 5305)
@@ -67,5 +67,5 @@
 
     protected String escape(String s) {
-        return s.replace("\"", "\\\"").replace("'", "\\'").replace("\n", "\\n");
+        return s.replace("\"", "\\\"").replace("\\", "\\\\").replace("\n", "\\n");
     }