diff --git a/src/Interpreter.jl b/src/Interpreter.jl
index 7065319d71..449f78de38 100644
--- a/src/Interpreter.jl
+++ b/src/Interpreter.jl
@@ -312,7 +312,9 @@ function overload_autodiff(
             act = act_from_type(A, reverse, needs_primal(CMode))
             push!(ret_activity, act)
             if act == enzyme_out || act == enzyme_outnoneed
-                attr = fill(MLIR.IR.Attribute(unwrapped_eltype(a)(1)), Ops.mlir_type(a))
+                attr = MLIR.IR.DenseElementsAttribute(
+                    fill(one(unwrapped_eltype(a)), size(a))
+                )
                 cst = MLIR.IR.result(MLIR.Dialects.stablehlo.constant(; value=attr), 1)
                 push!(ad_inputs, cst)
             end
diff --git a/test/autodiff.jl b/test/autodiff.jl
index 0b759db0b4..21e5525eb8 100644
--- a/test/autodiff.jl
+++ b/test/autodiff.jl
@@ -131,3 +131,15 @@ end
     res2 = @jit ddf(x)
     @test res2 ≈ 4 * 3 * 3.1^2
 end
+
+@testset "Seed initialization of Complex arrays on matmul: Issue #593" begin
+    a = ones(ComplexF64, 2, 2)
+    b = 2.0 * ones(ComplexF64, 2, 2)
+    a_re = Reactant.to_rarray(a)
+    b_re = Reactant.to_rarray(b)
+    df(x, y) = Enzyme.gradient(ReverseWithPrimal, *, x, y)
+    res = @jit df(a_re, b_re) # before, this segfaulted
+    @test res.val ≈ 4ones(2, 2)
+    @test res.derivs[1] ≈ 4ones(2, 2)
+    @test res.derivs[2] ≈ 2ones(2, 2)
+end