diff --git a/routergroup.go b/routergroup.go
index ad778c9c..19d7efe2 100644
--- a/routergroup.go
+++ b/routergroup.go
@@ -185,12 +185,15 @@ func (group *RouterGroup) StaticFS(relativePath string, fs http.FileSystem) IRou
 func (group *RouterGroup) createStaticHandler(relativePath string, fs http.FileSystem) HandlerFunc {
 	absolutePath := group.calculateAbsolutePath(relativePath)
 	fileServer := http.StripPrefix(absolutePath, http.FileServer(fs))
-	_, nolisting := fs.(*onlyfilesFS)
+	
 	return func(c *Context) {
-		if nolisting {
+		file := c.Param("filepath")
+		
+		// Check if file exists or if we have permission to access it
+		if _, err := fs.Open(file); err != nil {
 			c.Writer.WriteHeader(http.StatusNotFound)
-
 			c.handlers = group.engine.allNoRoute
+			// Reset index
 			c.index = -1
 			return
 		}