diff --git a/src/internal/buildcfg/cfg.go b/src/internal/buildcfg/cfg.go
index 1cc3d3d..e8553e8 100644
--- a/src/internal/buildcfg/cfg.go
+++ b/src/internal/buildcfg/cfg.go
@@ -110,8 +110,10 @@
 		return 8
 	case "power9":
 		return 9
+	case "power10":
+		return 10
 	}
-	Error = fmt.Errorf("invalid GOPPC64: must be power8, power9")
+	Error = fmt.Errorf("invalid GOPPC64: must be power8, power9, power10")
 	return int(defaultGOPPC64[len("power")] - '0')
 }