diff --git a/NEWS.md b/NEWS.md
index 97ceb39b5a93fa..5b9d2ba362117d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -31,7 +31,7 @@ Standard library changes
 
 * The methods of `mktemp` and `mktempdir` which take a function body to pass temporary paths to no longer throw errors if the path is already deleted when the function body returns ([#33091]).
 
-* A new `dropdims(f, args...; dims, kwargs...)` method computes the reduction `f` over the region described by `dims` and then drops those dimensions from the result ([#23500]).
+* A new `dropdims(f, args...; dims, kwargs...)` method computes the reduction `f` over the region described by `dims` and then drops those dimensions from the result ([#33130]).
 
 #### Libdl
 
diff --git a/base/abstractarraymath.jl b/base/abstractarraymath.jl
index c8ad5a376025a1..2a18d356c06f4b 100644
--- a/base/abstractarraymath.jl
+++ b/base/abstractarraymath.jl
@@ -92,6 +92,9 @@ _dropdims(A::AbstractArray, dim::Integer) = _dropdims(A, (Int(dim),))
 
 Compute reduction `f` over dimensions `dims` and drop those dimensions from the result.
 
+!!! compat "Julia 1.4"
+    This function requires at least Julia 1.4.
+
 # Examples
 ```jldoctest
 julia> a = [3.0  2.0  6.0  8.0