diff --git a/src/OrdinaryDiffEq.jl b/src/OrdinaryDiffEq.jl
index ae6b2001ab..505f8c72ac 100644
--- a/src/OrdinaryDiffEq.jl
+++ b/src/OrdinaryDiffEq.jl
@@ -108,7 +108,7 @@ import ADTypes: AbstractADType,
 import Polyester
 using MacroTools, Adapt
 
-using SciMLStructures: canonicalize, Tunable
+using SciMLStructures: canonicalize, Tunable, isscimlstructure
 
 const CompiledFloats = Union{Float32, Float64,
     ForwardDiff.Dual{
diff --git a/src/initialize_dae.jl b/src/initialize_dae.jl
index 2618ea1b79..9404d9531f 100644
--- a/src/initialize_dae.jl
+++ b/src/initialize_dae.jl
@@ -528,9 +528,10 @@ function _initialize_dae!(integrator, prob::ODEProblem,
     if isAD
         csize = count(algebraic_vars)
         if !(p isa SciMLBase.NullParameters) && typeof(_u) !== typeof(u)
-            try
+            if isscimlstructure(p)
                 csize = max(csize, length(canonicalize(Tunable(), p)[1]))
-            catch
+            else
+                csize = max(csize, length(p))
             end
         end
         chunk = ForwardDiff.pickchunksize(csize)