Index: /trunk/src/org/openstreetmap/josm/data/imagery/ImageryInfo.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/imagery/ImageryInfo.java	(revision 9006)
+++ /trunk/src/org/openstreetmap/josm/data/imagery/ImageryInfo.java	(revision 9007)
@@ -861,5 +861,5 @@
     public String getExtendedUrl() {
         return imageryType.getTypeString() + (defaultMaxZoom != 0
-            ? "["+(defaultMinZoom != 0 ? defaultMinZoom+',' : "")+defaultMaxZoom+"]" : "") + ':' + url;
+            ? "["+(defaultMinZoom != 0 ? Integer.toString(defaultMinZoom) + ',' : "")+defaultMaxZoom+"]" : "") + ':' + url;
     }
 
Index: /trunk/test/unit/org/openstreetmap/josm/data/imagery/ImageryInfoTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/data/imagery/ImageryInfoTest.java	(revision 9007)
+++ /trunk/test/unit/org/openstreetmap/josm/data/imagery/ImageryInfoTest.java	(revision 9007)
@@ -0,0 +1,35 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.data.imagery;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.openstreetmap.josm.JOSMFixture;
+
+/**
+ *
+ * Unit tests for class {@link ImageryInfo}.
+ *
+ */
+public class ImageryInfoTest {
+
+    /**
+     * Setup tests
+     */
+    @BeforeClass
+    public static void setUp() {
+        JOSMFixture.createUnitTestFixture().init();
+    }
+
+    /**
+     * Test if extended URL is returned properly
+     */
+    @Test
+    public void testGetExtendedUrl() {
+        ImageryInfo testImageryTMS =  new ImageryInfo("test imagery", "http://localhost", "tms", null, null);
+        testImageryTMS.setDefaultMinZoom(16);
+        testImageryTMS.setDefaultMaxZoom(23);
+        assertEquals("tms[16,23]:http://localhost", testImageryTMS.getExtendedUrl());
+    }
+}