diff --git a/src/definitions.jl b/src/definitions.jl
index 92fb158..3ba69cd 100644
--- a/src/definitions.jl
+++ b/src/definitions.jl
@@ -604,8 +604,8 @@ Base.adjoint(p::AdjointPlan{T}) where {T} = p.p
 # always have AdjointPlan inside ScaledPlan.
 Base.adjoint(p::ScaledPlan{T}) where {T} = ScaledPlan{T}(p.p', p.scale)
 
-size(p::AdjointPlan) = output_size(p)
-output_size(p::AdjointPlan) = size(p)
+size(p::AdjointPlan) = output_size(p.p)
+output_size(p::AdjointPlan) = size(p.p)
 
 Base.:*(p::AdjointPlan, x::AbstractArray) = _mul(p, x, ProjectionStyle(p.p))