diff --git a/projects/skcms/project.yaml b/projects/skcms/project.yaml
index c92ee3bce..97e2f9252 100644
--- a/projects/skcms/project.yaml
+++ b/projects/skcms/project.yaml
@@ -9,6 +9,7 @@ sanitizers:
  - memory
  - undefined
 architectures:
+  - aarch64  # Experimental, not generally available.
   - x86_64
   - i386
 main_repo: 'https://skia.googlesource.com/skcms.git'