diff --git a/stdlib/LinearAlgebra/src/dense.jl b/stdlib/LinearAlgebra/src/dense.jl
index 0688d6d39e128..1b3603c6a3ff8 100644
--- a/stdlib/LinearAlgebra/src/dense.jl
+++ b/stdlib/LinearAlgebra/src/dense.jl
@@ -291,6 +291,7 @@ function diagm_container(kv::Pair{<:Integer,<:BitVector}...)
     return falses(n, n)
 end
 
+diagm(v::AbstractVector) = diagm(0 => v)
 
 function tr(A::Matrix{T}) where T
     n = checksquare(A)