diff --git a/Source/Core/Core/Boot/Boot_BS2Emu.cpp b/Source/Core/Core/Boot/Boot_BS2Emu.cpp
index a33065a7c9..cfb40b126b 100644
--- a/Source/Core/Core/Boot/Boot_BS2Emu.cpp
+++ b/Source/Core/Core/Boot/Boot_BS2Emu.cpp
@@ -199,7 +199,10 @@ bool CBoot::SetupWiiMemory(DiscIO::IVolume::ECountry country)
 
 	if (serno.empty() || serno == "000000000")
 	{
-		serno = gen.generateSerialNumber();
+		if (Core::g_want_determinism)
+			serno = "123456789";
+		else
+			serno = gen.generateSerialNumber();
 		INFO_LOG(BOOT, "No previous serial number found, generated one instead: %s", serno.c_str());
 	}
 	else