diff --git a/utils/TableGen/CodeGenRegisters.cpp b/utils/TableGen/CodeGenRegisters.cpp
index a5bb5c2e63a..4c8d3608752 100644
--- a/utils/TableGen/CodeGenRegisters.cpp
+++ b/utils/TableGen/CodeGenRegisters.cpp
@@ -503,7 +503,6 @@ Record *CodeGenRegBank::getCompositeSubRegIndex(Record *A, Record *B,
   // None exists, synthesize one.
   std::string Name = A->getName() + "_then_" + B->getName();
   Comp = new Record(Name, SMLoc(), Records);
-  Records.addDef(Comp);
   SubRegIndices.push_back(Comp);
   return Comp;
 }