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-rw-r--r--BaseTools/Source/Python/AutoGen/AutoGen.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/BaseTools/Source/Python/AutoGen/AutoGen.py b/BaseTools/Source/Python/AutoGen/AutoGen.py
index c5ab334459..a7af33d520 100644
--- a/BaseTools/Source/Python/AutoGen/AutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGen.py
@@ -1292,7 +1292,7 @@ class PlatformAutoGen(AutoGen):
FixedAtBuildPcds = {}
ShareFixedAtBuildPcdsSameValue = {}
for Module in LibAuto._ReferenceModules:
- for Pcd in Module.FixedAtBuildPcds + LibAuto.FixedAtBuildPcds:
+ for Pcd in set(Module.FixedAtBuildPcds + LibAuto.FixedAtBuildPcds):
DefaultValue = Pcd.DefaultValue
# Cover the case: DSC component override the Pcd value and the Pcd only used in one Lib
if Pcd in Module.LibraryPcdList: