diff --git a/src/iterative_wrappers.jl b/src/iterative_wrappers.jl
index 319d373e2..dbdef5b9b 100644
--- a/src/iterative_wrappers.jl
+++ b/src/iterative_wrappers.jl
@@ -181,7 +181,7 @@ function init_cacheval(alg::KrylovJL, A, b, u, Pl, Pr, maxiters::Int, abstol, re
                      alg.KrylovAlg === Krylov.gpmr! ||
                      alg.KrylovAlg === Krylov.fom!)
             if A isa SparseMatrixCSC
-                KS(SparseMatrixCSC(0, 0, [1], Int64[], eltype(A)[]), eltype(b)[], 1)
+                KS(SparseMatrixCSC(0, 0, [1], Int[], eltype(A)[]), eltype(b)[], 1)
             elseif A isa Matrix
                 KS(Matrix{eltype(A)}(undef, 0, 0), eltype(b)[], 1)
             else
@@ -189,7 +189,7 @@ function init_cacheval(alg::KrylovJL, A, b, u, Pl, Pr, maxiters::Int, abstol, re
             end
         else
             if A isa SparseMatrixCSC
-                KS(SparseMatrixCSC(0, 0, [1], Int64[], eltype(A)[]), eltype(b)[])
+                KS(SparseMatrixCSC(0, 0, [1], Int[], eltype(A)[]), eltype(b)[])
             elseif A isa Matrix
                 KS(Matrix{eltype(A)}(undef, 0, 0), eltype(b)[])
             else