diff --git a/src/number.jl b/src/number.jl
index 7f7dddd..55f4d96 100644
--- a/src/number.jl
+++ b/src/number.jl
@@ -13,7 +13,7 @@ scalartype(::Type{T}) where {T <: Number} = T
 # scale & scale!!
 #-----------------
 # note: required to make scale(NaN, 0) = 0
-@inline scale(x::Number, α::Number) = (iszero(α) ? zero(x) : x) * α
+@inline scale(x::Number, α::Number) = ifelse(iszero(α), zero(x), x) * α
 @inline function scale(y::Number, x::Number, α::Number)
     T = Base.promote_op(*, typeof(y), typeof(x), typeof(α))
     return convert(T, scale(x, α))