diff --git a/src/conversions.jl b/src/conversions.jl
index 5211078d95f..feb4c3a4e71 100644
--- a/src/conversions.jl
+++ b/src/conversions.jl
@@ -361,7 +361,7 @@ end
 to_interval(x::Tuple{<: Real, <: Real}) = float_convert(x[1]) .. float_convert(x[2])
 to_interval(x::Interval) = float_convert(leftendpoint(x)) .. float_convert(rightendpoint(x))
 function to_interval(x::Union{AbstractVector})
-    return float_convert(minimum(x)) .. float_convert(maximum(x))
+    return float_convert(first(x)) .. float_convert(last(x))
 end
 
 
@@ -649,7 +649,8 @@ end
 #                               Helper Functions                               #
 ################################################################################
 
-to_linspace(interval, N) = range(minimum(interval), stop = maximum(interval), length = N)
+to_linspace(interval::Interval, N) = range(leftendpoint(interval), stop = rightendpoint(interval), length = N)
+to_linspace(x, N) = range(first(x), stop = last(x), length = N)
 
 """
 Converts the element array type to `T1` without making a copy if the element type matches