diff --git a/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java b/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java
index af419f5ee2..65b7311901 100644
--- a/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java
+++ b/src/main/java/com/alibaba/druid/support/http/WebStatFilter.java
@@ -140,7 +140,7 @@ public class WebStatFilter implements Filter {
             if (uriStat == null) {
                 int status = responseWrapper.getStatus();
                 if (status == HttpServletResponse.SC_NOT_FOUND) {
-                    String errorUrl = contextPath + "/error_" + status;
+                    String errorUrl = contextPath + "error_" + status;
                     uriStat = webAppStat.getURIStat(errorUrl, true);
                 } else {
                     uriStat = webAppStat.getURIStat(requestURI, true);