diff --git a/core/router/path.go b/core/router/path.go
index 6c32c863..6d9b687a 100644
--- a/core/router/path.go
+++ b/core/router/path.go
@@ -231,6 +231,11 @@ func splitSubdomainAndPath(fullUnparsedPath string) (subdomain string, path stri
 		return "", "/"
 	}
 
+	splitPath := strings.Split(s, ".")
+	if len(splitPath) == 2 && splitPath[1] == "" {
+		return splitPath[0] + ".", "/"
+	}
+
 	slashIdx := strings.IndexByte(s, '/')
 	if slashIdx > 0 {
 		// has subdomain
diff --git a/core/router/path_test.go b/core/router/path_test.go
index 2b2c7538..bdf2d4ad 100644
--- a/core/router/path_test.go
+++ b/core/router/path_test.go
@@ -116,6 +116,8 @@ func TestSplitSubdomainAndPath(t *testing.T) {
 		path      string
 	}{
 		{"admin./users/42", "admin.", "/users/42"},
+		{"admin.", "admin.", "/"},
+		{"admin./" + WildcardFileParam(), "admin.", "/" + WildcardFileParam()},
 		{"//api/users\\42", "", "/api/users/42"},
 		{"admin./users//42", "admin.", "/users/42"},
 		{"*./users/42/", "*.", "/users/42"},