diff --git a/base/promotion.jl b/base/promotion.jl
index 24d0835a8b94a..8a89ce73d1788 100644
--- a/base/promotion.jl
+++ b/base/promotion.jl
@@ -476,7 +476,7 @@ xor(x::T, y::T) where {T<:Integer} = no_op_err("xor", T)
 
 (==)(x::T, y::T) where {T<:Number} = x === y
 (< )(x::T, y::T) where {T<:Real} = no_op_err("<" , T)
-(<=)(x::T, y::T) where {T<:Real} = no_op_err("<=", T)
+(<=)(x::T, y::T) where {T<:Real} = (x == y) | (x < y)
 
 rem(x::T, y::T) where {T<:Real} = no_op_err("rem", T)
 mod(x::T, y::T) where {T<:Real} = no_op_err("mod", T)
diff --git a/test/operators.jl b/test/operators.jl
index 97edebc0ea6f3..33fb8ad072196 100644
--- a/test/operators.jl
+++ b/test/operators.jl
@@ -303,3 +303,14 @@ end
     @test Returns(val)(1) === val
     @test sprint(show, Returns(1.0)) == "Returns{Float64}(1.0)"
 end
+
+@testset "<= (issue #46327)" begin
+    struct A46327 <: Real end
+    Base.:(==)(::A46327, ::A46327) = false
+    Base.:(<)(::A46327, ::A46327) = false
+    @test !(A46327() <= A46327())
+    struct B46327 <: Real end
+    Base.:(==)(::B46327, ::B46327) = true
+    Base.:(<)(::B46327, ::B46327) = false
+    @test B46327() <= B46327()
+end