diff --git a/platforms/defaults.go b/platforms/defaults.go
index 2b57b4979..ed493ab2c 100644
--- a/platforms/defaults.go
+++ b/platforms/defaults.go
@@ -16,6 +16,7 @@ func DefaultSpec() specs.Platform {
 	return specs.Platform{
 		OS:           runtime.GOOS,
 		Architecture: runtime.GOARCH,
-		// TODO(stevvooe): Need to resolve GOARM for arm hosts.
+		// The Variant field will be empty if arch != ARM.
+		Variant: cpuVariant,
 	}
 }