diff --git a/src/ukf.jl b/src/ukf.jl
index 14a07c2..d5ed878 100644
--- a/src/ukf.jl
+++ b/src/ukf.jl
@@ -149,11 +149,11 @@ function UnscentedKalmanFilter{IPD,IPM,AUGD,AUGM}(dynamics, measurement_model::A
         dynamics, measurement_model, R1, d0, predict_sigma_point_cache, x0, R, 0, Ts, ny, nu, p, reject, state_mean, state_cov)
 end
 
-function UnscentedKalmanFilter{IPD,IPM,AUGD,AUGM}(dynamics, measurement, R1, R2, d0=SimpleMvNormal(R1), args...; p = NullParameters(), ny, nu, kwargs...) where {IPD,IPM,AUGD,AUGM}
+function UnscentedKalmanFilter{IPD,IPM,AUGD,AUGM}(dynamics, measurement, R1, R2, d0=SimpleMvNormal(R1), args...; Ts = 1.0, p = NullParameters(), ny, nu, kwargs...) where {IPD,IPM,AUGD,AUGM}
     nx = length(d0)
     T = promote_type(eltype(d0), eltype(R1), eltype(R2))
     measurement_model = UKFMeasurementModel{T,IPM,AUGM}(measurement, R2; nx, ny, kwargs...)
-    UnscentedKalmanFilter{IPD,IPM,AUGD,AUGM}(dynamics, measurement_model, R1, d0, args...; p, nu, kwargs...)
+    UnscentedKalmanFilter{IPD,IPM,AUGD,AUGM}(dynamics, measurement_model, R1, d0, args...; Ts, p, nu, kwargs...)
 end