diff --git a/README.md b/README.md
index 61f17d205..bdf9b8a6e 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ Tracking the evolution of https://github.com/uutils/coreutils when executing the
 
 Refreshed once a day by github actions.
 
+Compares only the Linux execution.
+
 Based on:
 * https://github.com/uutils/coreutils/blob/master/util/build-gnu.sh
 * https://github.com/uutils/coreutils/blob/master/util/run-gnu-test.sh