diff --git a/.github/workflows/schema-diff.yml b/.github/workflows/schema-diff.yml
index 1fef5a2183..977193e854 100644
--- a/.github/workflows/schema-diff.yml
+++ b/.github/workflows/schema-diff.yml
@@ -86,7 +86,7 @@ jobs:
 
           # Parse it through jq to build a valid json object.
           jq --null-input \
-            --arg comment "$(cat github-comment.txt)" \
+            --rawfile comment github-comment.txt \
             '{"body": $comment}' > body.json
 
           # Post comment on PR.