diff --git a/src/channels/applications.jl b/src/channels/applications.jl
index b6a6797..f0f3fad 100644
--- a/src/channels/applications.jl
+++ b/src/channels/applications.jl
@@ -69,7 +69,7 @@ end
 
 function applychannel(Φ::UnitaryChannel{<:AbstractMatrix{<:Number}}, ψ::AbstractVector{<:Number})
     # TODO: promote type
-    Φ*ψ
+    Φ.matrix*ψ
 end
 
 function applychannel(Φ::IdentityChannel{<:AbstractMatrix{<:Number}}, ψ::AbstractVector{<:Number})
@@ -99,4 +99,4 @@ for qop in (:KrausOperators, :SuperOperator, :DynamicalMatrix, :Stinespring,
             applychannel(Φ, ρ)
         end
     end
-end
\ No newline at end of file
+end