diff --git a/src/ODE.jl b/src/ODE.jl
index e8ccc55c1..d530451a9 100644
--- a/src/ODE.jl
+++ b/src/ODE.jl
@@ -120,8 +120,8 @@ function make_consistent_types(fn, y0, tspan, btab::Tableau)
     # On container: eltype, promote_type
     # On time container: eltype
 
-    Ty = typeof(y0)
     Eyf = typeof(y0[1]/(tspan[end]-tspan[1]))
+    Ty = typeof(similar(y0, Eyf, 1))
 
     Et = eltype(tspan)
     @assert Et<:Real
@@ -265,7 +265,8 @@ function ode23s(F, y0, tspan; reltol = 1.0e-5, abstol = 1.0e-8,
     h = tdir * min(abs(h), maxstep)
 
     y = y0
-    tout = Array(typeof(t), 1)
+    # below promotion should maybe be replaced by using make_consistent_types
+    tout = Array(promote_type(typeof(t), Float64), 1)
     tout[1] = t         # first output time
     yout = Array(typeof(y0), 1)
     yout[1] = deepcopy(y)         # first output solution
diff --git a/test/interface-tests.jl b/test/interface-tests.jl
index dbb811dcc..c134aae03 100644
--- a/test/interface-tests.jl
+++ b/test/interface-tests.jl
@@ -45,19 +45,19 @@ ODE.isoutofdomain(y::CompSol) = any(isnan, vcat(y.rho[:], y.x, y.p))
 
 
 ################################################################################
- 
+
 # define RHSs of differential equations
 # delta, V and g are parameters
 function rhs(t, y, delta, V, g)
   H = [[-delta/2 V]; [V delta/2]]
- 
+
   rho_dot = -im*H*y.rho + im*y.rho*H
   x_dot = y.p
   p_dot = -y.x
- 
+
   return CompSol( rho_dot, x_dot, p_dot)
 end
- 
+
 # inital conditons
 rho0 = zeros(2,2);
 rho0[1,1]=1.;
@@ -75,6 +75,9 @@ for solver in solvers
     end
     t,y2 = solver((t,y)->rhs(t, y, delta0, V0, g0), y0, linspace(0., endt, 500))
     @test norm(y1[end]-y2[end])<0.1
+
+    # test that typeof(tspan)==Vector{Int} does not throw:
+    t,y2 = solver((t,y)->rhs(t, y, delta0, V0, g0), y0, [0,1])
 end
 println("ok.")
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 9c88cd281..3f761bdf4 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -40,6 +40,14 @@ for solver in solvers
     t,y=solver((t,y)->2t, 0., [0:.001:1;])
     @test maximum(abs(y-t.^2)) < tol
 
+    # test typeof(tspan)==Vector{Int} does not throw
+    t,y=solver((t,y)->2t, 0., [0,1])
+    if !(solver in [ODE.ode4s_s, ODE.ode4s_kr, ODE.ode23s])
+        # test typeof(y0)==Vector{Int} does not throw
+        t,y=solver((t,y)->[2t], [0], [0,1])
+        # test typeof(y0)==Int does not throw
+        t,y=solver((t,y)->2t, 0, [0,1])
+    end
 
     # dy
     # -- = y ==> y = y0*e.^t