diff --git a/node.go b/node.go
index 81cfb16..8f72ebc 100644
--- a/node.go
+++ b/node.go
@@ -34,11 +34,13 @@ func (n *node) regexpToString() string {
 
 func (n *node) setRegexp(exp string) {
 	reg, err := regexp.Compile(exp)
-	if err == nil {
-		n.regexp = reg
-		n.isRegexp = true
-		n.isWildcard = true
+	if err != nil {
+		panic(err)
 	}
+
+	n.regexp = reg
+	n.isRegexp = true
+	n.isWildcard = true
 }
 
 func (n *node) setRoute(r *route) {
diff --git a/router_test.go b/router_test.go
index 776dba2..c571ce6 100644
--- a/router_test.go
+++ b/router_test.go
@@ -172,12 +172,7 @@ func TestOPTIONS(t *testing.T) {
 
 	router := New().(*router)
 	testBasicMethod(t, router, router.OPTIONS, OPTIONS)
-}
-
-func TestOPTIONSWithoutHandler(t *testing.T) {
-	t.Parallel()
 
-	router := New().(*router)
 	handler := &mockHandler{}
 	router.GET("/x/y", handler)
 	router.POST("/x/y", handler)
@@ -185,6 +180,8 @@ func TestOPTIONSWithoutHandler(t *testing.T) {
 	checkIfHasRootRoute(t, router, GET)
 
 	w := httptest.NewRecorder()
+
+	// test all routes "*" paths
 	req, err := http.NewRequest(OPTIONS, "*", nil)
 	if err != nil {
 		t.Fatal(err)
@@ -195,6 +192,18 @@ func TestOPTIONSWithoutHandler(t *testing.T) {
 	if allow := w.Header().Get("Allow"); allow != "POST, GET, OPTIONS" {
 		t.Errorf("Allow header incorrect value: %s", allow)
 	}
+
+	// test specific path
+	req, err = http.NewRequest(OPTIONS, "/x/y", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	router.ServeHTTP(w, req)
+
+	if allow := w.Header().Get("Allow"); allow != "POST, GET, OPTIONS" {
+		t.Errorf("Allow header incorrect value: %s", allow)
+	}
 }
 
 func TestNotFound(t *testing.T) {
@@ -483,7 +492,7 @@ func TestChainCalls(t *testing.T) {
 	router := New().(*router)
 
 	serverd := false
-	router.GET("/users/{user}/starred", http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
+	router.GET("/users/{user:[a-z0-9]+)}/starred", http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
 		serverd = true
 
 		params, ok := FromContext(r.Context())
diff --git a/tree.go b/tree.go
index 1d90a7d..d0e37ea 100644
--- a/tree.go
+++ b/tree.go
@@ -65,7 +65,7 @@ func (t *tree) getByID(id string) *node {
 		}
 
 		for _, child := range t.regexps {
-			if child.regexp.MatchString(id) {
+			if child.regexp != nil && child.regexp.MatchString(id) {
 				return child
 			}
 		}
@@ -96,7 +96,7 @@ func (t *tree) getByPath(path string) (*node, string, string) {
 	}
 
 	for _, child := range t.regexps {
-		if child.regexp.MatchString(part) {
+		if child.regexp != nil && child.regexp.MatchString(part) {
 			return child, part, path[len(part):]
 		}
 	}