diff --git a/lld/ELF/InputFiles.cpp b/lld/ELF/InputFiles.cpp
--- a/lld/ELF/InputFiles.cpp
+++ b/lld/ELF/InputFiles.cpp
@@ -1715,6 +1715,11 @@
   if (isBitcode(mb))
     return make<BitcodeFile>(mb, archiveName, offsetInArchive, /*lazy=*/false);
 
+  // If it is a fatLTO object file
+  Expected<MemoryBufferRef> fatLTOData = IRObjectFile::findBitcodeInMemBuffer(mb);
+  if (!errorToBool(fatLTOData.takeError()))
+    return make<BitcodeFile>(*fatLTOData, archiveName, offsetInArchive, /*lazy=*/false);
+
   switch (getELFKind(mb, archiveName)) {
   case ELF32LEKind:
     return make<ObjFile<ELF32LE>>(mb, archiveName);
diff --git a/llvm/lib/Object/ObjectFile.cpp b/llvm/lib/Object/ObjectFile.cpp
--- a/llvm/lib/Object/ObjectFile.cpp
+++ b/llvm/lib/Object/ObjectFile.cpp
@@ -79,7 +79,7 @@
 bool ObjectFile::isSectionBitcode(DataRefImpl Sec) const {
   Expected<StringRef> NameOrErr = getSectionName(Sec);
   if (NameOrErr)
-    return *NameOrErr == ".llvmbc";
+    return *NameOrErr == ".llvmbc" || *NameOrErr == ".fatlto";
   consumeError(NameOrErr.takeError());
   return false;
 }