diff --git a/core/src/main/resources/template/simple/radiomap.ftl b/core/src/main/resources/template/simple/radiomap.ftl
index 61950e970..9c846e546 100644
--- a/core/src/main/resources/template/simple/radiomap.ftl
+++ b/core/src/main/resources/template/simple/radiomap.ftl
@@ -65,7 +65,7 @@
  name="${parameters.name?html}"<#rt/>
 </#if>
  id="${parameters.id?html}${itemKeyStr?html}"<#rt/>
-<#if tag.contains(parameters.nameValue!'', itemKeyStr)>
+<#if tag.contains(parameters.nameValue, itemKey)>
  checked="checked"<#rt/>
 </#if>
 <#if itemKey??>