diff --git a/.github/workflows/api-spec.yml b/.github/workflows/api-spec.yml
index ba00c4a..7dd51eb 100644
--- a/.github/workflows/api-spec.yml
+++ b/.github/workflows/api-spec.yml
@@ -163,7 +163,9 @@ jobs:
       - name: Determine whether the spec changed
         id: changes
         run: |
-          if [ -s changelog.md ] && ! grep -qi 'no changes' changelog.md; then
+          # oasdiff writes "No changelog changes" (v0.1.x) / "No changes" (older)
+          # when the spec is unchanged; treat either as no change.
+          if [ -s changelog.md ] && ! grep -qiE 'no (changelog )?changes' changelog.md; then
             echo "has_changes=true" >> "$GITHUB_OUTPUT"
           else
             echo "has_changes=false" >> "$GITHUB_OUTPUT"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7869f9..f63ea1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ See [keep a changelog] for information about writing changes to this log.
 
 ## [Unreleased]
 
+- [PR-61](https://github.com/itk-dev/event-database-api/pull/61)
+  Fix the API-spec workflow's no-change detection for oasdiff v0.1.x ("No changelog changes" wording)
 - [PR-60](https://github.com/itk-dev/event-database-api/pull/60)
   Upgrade Elasticsearch to 8.19.18 (dev image) and the `elasticsearch/elasticsearch` client constraint to `^8.19`
 - [PR-59](https://github.com/itk-dev/event-database-api/pull/59)