diff --git a/Platforms/QemuQ35Pkg/PlatformBuild.py b/Platforms/QemuQ35Pkg/PlatformBuild.py
index e951f517d0..9a13d0a31c 100644
--- a/Platforms/QemuQ35Pkg/PlatformBuild.py
+++ b/Platforms/QemuQ35Pkg/PlatformBuild.py
@@ -220,7 +220,7 @@ def SetPlatformEnv(self):
         # Default turn on build reporting.
         self.env.SetValue("BUILDREPORTING", "TRUE", "Enabling build report")
         self.env.SetValue("BUILDREPORT_TYPES", "PCD DEPEX FLASH BUILD_FLAGS LIBRARY FIXED_ADDRESS HASH", "Setting build report types")
-        self.env.SetValue("BLD_*_QEMU_CORE_NUM", "4", "Default")
+        self.env.SetValue("BLD_*_QEMU_CORE_NUM", "2", "Default")
         # Include the MFCI test cert by default, override on the commandline with "BLD_*_SHIP_MODE=TRUE" if you want the retail MFCI cert
         self.env.SetValue("BLD_*_SHIP_MODE", "FALSE", "Default")
         self.__SetEsrtGuidVars("CONF_POLICY_GUID", "6E08E434-8E04-47B5-9A77-78A3A24523EA", "Platform Hardcoded")