diff --git a/src/interfaces.jl b/src/interfaces.jl
index d265477b..6a09dc7d 100644
--- a/src/interfaces.jl
+++ b/src/interfaces.jl
@@ -555,6 +555,7 @@ plottype(::Type{Any}, argvalues...) = plottype(argvalues...)
 plottype(P::Type{<: Combined{T}}, argvalues...) where T = P
 
 ## specialized definitions for types
+plottype(::AbstractVector, ::AbstractVector, ::AbstractVector) = Scatter
 plottype(::AbstractVector, ::AbstractVector) = Scatter
 plottype(::AbstractVector) = Scatter
 plottype(::AbstractMatrix{<: Real}) = Heatmap