diff --git a/src/GeometricalPredicates.jl b/src/GeometricalPredicates.jl
index 718017b..f47f356 100644
--- a/src/GeometricalPredicates.jl
+++ b/src/GeometricalPredicates.jl
@@ -165,8 +165,9 @@ struct Polygon2D{T<:AbstractPoint2D} <: AbstractPolygon2D
     _p::Vector{T}
     _l::Vector{AbstractLine2D}
     function Polygon2D{T}(p::T...) where {T<:AbstractPoint2D}
-        l = map(1:length(p)-1) do i
-            Line(p[i], p[i+1])
+        l = []
+        for i in range(1, stop=length(p)-1)
+            push!(l, Line(p[i], p[i+1]))
         end
         push!(l, Line(p[end], p[1]))
         new([p...;], l)