diff --git a/deps/v8/SConstruct b/deps/v8/SConstruct
index c2a7508917..4da9b5b4f1 100755
--- a/deps/v8/SConstruct
+++ b/deps/v8/SConstruct
@@ -544,7 +544,7 @@ def GuessToolchain(os):
 
 OS_GUESS = utils.GuessOS()
 TOOLCHAIN_GUESS = GuessToolchain(OS_GUESS)
-ARCH_GUESS = utils.GuessArchitecture()
+ARCH_GUESS = utils.GuessArchitecture() or ""
 
 
 SIMPLE_OPTIONS = {