diff --git a/cc/lto.go b/cc/lto.go
index 581856b..1afa1dd 100644
--- a/cc/lto.go
+++ b/cc/lto.go
@@ -91,6 +91,11 @@
 		return flags
 	}
 
+	// TODO(b/254713216): LTO doesn't work on riscv64 yet.
+	if ctx.Arch().ArchType == android.Riscv64 {
+		return flags
+	}
+
 	if lto.LTO(ctx) {
 		var ltoCFlag string
 		var ltoLdFlag string