diff --git a/src/preset_time.jl b/src/preset_time.jl
index 417386bb..8eeec723 100644
--- a/src/preset_time.jl
+++ b/src/preset_time.jl
@@ -4,6 +4,8 @@ PresetTimeCallback(tstops, user_affect!;
     initialize = DiffEqBase.INITIALIZE_DEFAULT,
     filter_tstops = true,
     kwargs...)
+
+PresetTimeCallback(user_affect!::Function, tstops; kwargs...)
 ```
 
 A callback that adds callback `affect!` calls at preset times. No playing around with
@@ -61,4 +63,8 @@ function PresetTimeCallback(tstops, user_affect!;
     DiscreteCallback(condition, user_affect!; initialize = initialize_preset, kwargs...)
 end
 
+function PresetTimeCallback(affect!::Function, ts; kwargs...)
+    PresetTimeCallback(ts, affect!; kwargs...)
+end
+
 export PresetTimeCallback
diff --git a/test/preset_time.jl b/test/preset_time.jl
index be082135..6fbdda7c 100644
--- a/test/preset_time.jl
+++ b/test/preset_time.jl
@@ -21,6 +21,15 @@ sol = solve(prob, Tsit5(), callback = cb)
 @test 0.5 ∈ sol.t
 @test p != startp
 
+# test do syntax
+p .= startp # reset startp
+cbdoo = PresetTimeCallback(0.5) do integrator
+    integrator.p .= rand(4, 4)
+end
+sol = solve(prob, Tsit5(), callback = cbdoo)
+@test 0.5 ∈ sol.t
+@test p != startp
+
 p = rand(4, 4)
 startp = copy(p)