1 files changed, 2 insertions, 0 deletions
diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 0570c29f1a..e5693c0d27 100755
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -897,6 +897,7 @@ class Build():
     # $(TARGET), $(TOOLCHAIN), $(TOOLCHAIN_TAG), or $(ARCH) operands.
     #
     def GetToolChainAndFamilyFromDsc (self, File):
+        SavedGlobalDefines = GlobalData.gGlobalDefines.copy()
         for BuildTarget in self.BuildTargetList:
             GlobalData.gGlobalDefines['TARGET'] = BuildTarget
             for BuildToolChain in self.ToolChainList:
@@ -929,6 +930,7 @@ class Build():
                             self.ToolDef.ToolsDefTxtDatabase[TAB_TOD_DEFINES_TOOL_CHAIN_TAG] = []
                         if ToolChain not in self.ToolDef.ToolsDefTxtDatabase[TAB_TOD_DEFINES_TOOL_CHAIN_TAG]:
                             self.ToolDef.ToolsDefTxtDatabase[TAB_TOD_DEFINES_TOOL_CHAIN_TAG].append(ToolChain)
+        GlobalData.gGlobalDefines = SavedGlobalDefines
 
     ## Load configuration
     #