diff --git a/designer-base/src/main/java/com/fr/design/actions/file/WebPreviewUtils.java b/designer-base/src/main/java/com/fr/design/actions/file/WebPreviewUtils.java
index 5434abc09..18c93f74c 100644
--- a/designer-base/src/main/java/com/fr/design/actions/file/WebPreviewUtils.java
+++ b/designer-base/src/main/java/com/fr/design/actions/file/WebPreviewUtils.java
@@ -9,6 +9,7 @@ import com.fr.design.utils.DesignUtils;
 import com.fr.file.FILE;
 import com.fr.file.FileNodeFILE;
 import com.fr.general.GeneralUtils;
+import com.fr.general.web.ParameterConstants;
 import com.fr.stable.project.ProjectConstants;
 import com.fr.stable.web.AbstractWebletCreator;
 
@@ -26,7 +27,11 @@ public final class WebPreviewUtils {
     @SuppressWarnings("unchecked")
     public static void preview(JTemplate<?, ?> jt, PreviewProvider provider) {
         String baseRoute = jt.route();
-        actionPerformed(jt, baseRoute, provider == null ? Collections.EMPTY_MAP : provider.parametersForPreview(), provider.getActionType());
+        if (provider == null) {
+            actionPerformed(jt, baseRoute, Collections.EMPTY_MAP, ParameterConstants.VIEWLET);
+        } else {
+            actionPerformed(jt, baseRoute, provider.parametersForPreview(), provider.getActionType());
+        }
     }
 
     private static void actionPerformed(JTemplate<?, ?> jt, String baseRoute, Map<String, Object> map, String actionType) {