diff --git a/README.md b/README.md
index 0d40cac..b59abf5 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # ResearchSoftwareMetadata
 
 [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://richardreeve.github.io/ResearchSoftwareMetadata.jl/stable/)
+[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://richardreeve.github.io/ResearchSoftwareMetadata.jl/dev/)
 [![Build Status](https://github.com/richardreeve/ResearchSoftwareMetadata.jl/actions/workflows/testing.yaml/badge.svg?branch=main)](https://github.com/richardreeve/ResearchSoftwareMetadata.jl/actions/workflows/testing.yaml?query=branch%3Amain)
 [![Coverage](https://codecov.io/gh/richardreeve/ResearchSoftwareMetadata.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/richardreeve/ResearchSoftwareMetadata.jl)
 [![PkgEval](https://JuliaCI.github.io/NanosoldierReports/pkgeval_badges/R/ResearchSoftwareMetadata.svg)](https://JuliaCI.github.io/NanosoldierReports/pkgeval_badges/R/ResearchSoftwareMetadata.html)
@@ -30,7 +31,7 @@ built and installed with `add`. For example:
 
 First you need to add a small amount of additional metadata into your `Project.toml` file.
 
-To  capture the license you are using and propagate it throughout the metadata files and through your julia code, add an [SPDX identifier](https://spdx.org/licenses/) to the file:
+To  capture the license you are using and propagate it throughout the metadata files and through your julia code, add an [SPDX license identifier](https://spdx.org/licenses/) to the file:
 
 ```toml
 [license]
diff --git a/src/ResearchSoftwareMetadata.jl b/src/ResearchSoftwareMetadata.jl
index 1002e10..f73dabf 100644
--- a/src/ResearchSoftwareMetadata.jl
+++ b/src/ResearchSoftwareMetadata.jl
@@ -276,7 +276,11 @@ function crosswalk(; category = nothing, keywords = nothing, build = false, upda
     cm_platforms = sort(string.(get(codemeta, "operatingSystem", String[])))
     if length(platforms) ≠ length(cm_platforms) ||
        any(platforms .≠ cm_platforms)
-        @error "codemeta platforms do not match workflows ($cm_platforms ≠ $platforms), fixing"
+        if isempty(cm_platforms)
+            @info "No platform info in codemeta.json, so filling from workflows ($platforms)"
+        else
+            @error "codemeta platforms do not match workflows ($cm_platforms ≠ $platforms), fixing"
+        end
         codemeta["operatingSystem"] = platforms
     end