diff --git a/tree.go b/tree.go
index 25b78e50..f93dfa64 100644
--- a/tree.go
+++ b/tree.go
@@ -467,7 +467,7 @@ func splitPath(key string) []string {
 // ":name:string" -> true, [:name], ([\w]+)
 // ":id([0-9]+)" -> true, [:id], ([0-9]+)
 // ":id([0-9]+)_:name" -> true, [:id :name], ([0-9]+)_(.+)
-// "cms_:id_:page.html" -> true, [:id_ :page], cms_(.+)(.+).html
+// "cms_:id_:page.html" -> true, [:id :page], cms_(.+)_(.+).html
 // "cms_:id(.+)_:page.html" -> true, [:id :page], cms_(.+)_(.+).html
 // "*" -> true, [:splat], ""
 // "*.*" -> true,[. :path :ext], ""      . meaning separator
@@ -487,7 +487,7 @@ func splitSegment(key string) (bool, []string, string) {
 		var expt []rune
 		var skipnum int
 		params := []string{}
-		reg := regexp.MustCompile(`[a-zA-Z0-9_]+`)
+		reg := regexp.MustCompile(`[a-zA-Z0-9]+`)
 		for i, v := range key {
 			if skipnum > 0 {
 				skipnum--
diff --git a/tree_test.go b/tree_test.go
index 81ff7edd..a20aed84 100644
--- a/tree_test.go
+++ b/tree_test.go
@@ -74,6 +74,8 @@ func init() {
 	routers = append(routers, testinfo{"/v1/:v(.+)_cms/ttt_:id(.+)_:page(.+).html", "/v1/2_cms/ttt_123_1.html", map[string]string{":v": "2", ":id": "123", ":page": "1"}})
 	routers = append(routers, testinfo{"/api/projects/:pid/members/?:mid", "/api/projects/1/members", map[string]string{":pid": "1"}})
 	routers = append(routers, testinfo{"/api/projects/:pid/members/?:mid", "/api/projects/1/members/2", map[string]string{":pid": "1", ":mid": "2"}})
+	routers = append(routers, testinfo{"/view/:id_:page", "/view/12_33", map[string]string{":id": "12", ":page": "33"}})
+	routers = append(routers, testinfo{"/view/:id_:page.html", "/view/12_33.html", map[string]string{":id": "12", ":page": "33"}})
 }
 
 func TestTreeRouters(t *testing.T) {