diff --git a/core/src/main/resources/template/simple/radiomap.ftl b/core/src/main/resources/template/simple/radiomap.ftl
index e0a583892..bcd7048e8 100644
--- a/core/src/main/resources/template/simple/radiomap.ftl
+++ b/core/src/main/resources/template/simple/radiomap.ftl
@@ -37,7 +37,7 @@
  name="${parameters.name?html}"<#rt/>
 </#if>
  id="${parameters.id?html}${itemKeyStr?html}"<#rt/>
-<#if tag.contains(parameters.nameValue, itemKeyStr)>
+<#if tag.contains(parameters.nameValue?default(''), itemKeyStr)>
  checked="checked"<#rt/>
 </#if>
 <#if itemKey?exists>
diff --git a/core/src/test/java/org/apache/struts2/views/jsp/ui/RadioTest.java b/core/src/test/java/org/apache/struts2/views/jsp/ui/RadioTest.java
index c66c97e36..640a4673a 100644
--- a/core/src/test/java/org/apache/struts2/views/jsp/ui/RadioTest.java
+++ b/core/src/test/java/org/apache/struts2/views/jsp/ui/RadioTest.java
@@ -75,6 +75,28 @@ public class RadioTest extends AbstractUITagTest {
 
         verify(RadioTag.class.getResource("Radio-2.txt"));
     }
+    
+    public void testMapCheckedNull() throws Exception {
+        TestAction testAction = (TestAction) action;
+        testAction.setFoo("bar");
+
+        HashMap map = new HashMap();
+        map.put("1", "One");
+        map.put("2", "Two");
+        testAction.setMap(map);
+
+        RadioTag tag = new RadioTag();
+        tag.setPageContext(pageContext);
+        tag.setLabel("mylabel");
+        tag.setName("myname");
+        tag.setValue("%{map['3']}");
+        tag.setList("#@java.util.HashMap@{\"1\":\"One\", \"2\":\"Two\", \"\":\"N/A\"}");
+
+        tag.doStartTag();
+        tag.doEndTag();
+
+        verify(RadioTag.class.getResource("Radio-4.txt"));
+    }
 
     public void testSimple() throws Exception {
         TestAction testAction = (TestAction) action;
diff --git a/core/src/test/resources/org/apache/struts2/views/jsp/ui/Radio-4.txt b/core/src/test/resources/org/apache/struts2/views/jsp/ui/Radio-4.txt
new file mode 100644
index 000000000..34e8dc89e
--- /dev/null
+++ b/core/src/test/resources/org/apache/struts2/views/jsp/ui/Radio-4.txt
@@ -0,0 +1,8 @@
+<tr>
+    <td class="tdLabel"><label for="myname" class="label">mylabel:</label></td>
+    <td>
+<input type="radio" name="myname" id="myname2" value="2"/><label for="myname2">Two</label>
+<input type="radio" name="myname" id="myname1" value="1"/><label for="myname1">One</label>
+<input type="radio" name="myname" id="myname" checked="checked" value=""/><label for="myname">N/A</label>
+    </td>
+</tr>