diff --git a/llvm/lib/Object/MachOUniversalWriter.cpp b/llvm/lib/Object/MachOUniversalWriter.cpp
index 997235f0b7416..8205604377082 100644
--- a/llvm/lib/Object/MachOUniversalWriter.cpp
+++ b/llvm/lib/Object/MachOUniversalWriter.cpp
@@ -281,7 +281,7 @@ buildFatArchList(ArrayRef<Slice> Slices) {
               .str()
               .c_str());
 
-    FatArchTy FatArch;
+    FatArchTy FatArch = {};
     FatArch.cputype = S.getCPUType();
     FatArch.cpusubtype = S.getCPUSubType();
     FatArch.offset = Offset;