Index: trunk/src/org/openstreetmap/josm/gui/layer/geoimage/CorrelateGpxWithImages.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/geoimage/CorrelateGpxWithImages.java	(revision 9697)
+++ trunk/src/org/openstreetmap/josm/gui/layer/geoimage/CorrelateGpxWithImages.java	(revision 9698)
@@ -1176,5 +1176,5 @@
     private static Double getElevation(WayPoint wp) {
         String value = wp.getString(GpxConstants.PT_ELE);
-        if (value != null) {
+        if (value != null && !value.isEmpty()) {
             try {
                 return new Double(value);