diff --git a/lib/Target/IA64/CMakeLists.txt b/lib/Target/IA64/CMakeLists.txt
index 6088ba12471..6163f91b6a5 100644
--- a/lib/Target/IA64/CMakeLists.txt
+++ b/lib/Target/IA64/CMakeLists.txt
@@ -15,6 +15,7 @@ add_llvm_target(IA64
   IA64ISelDAGToDAG.cpp
   IA64ISelLowering.cpp
   IA64RegisterInfo.cpp
+  IA64Subtarget.cpp
   IA64TargetAsmInfo.cpp
   IA64TargetMachine.cpp
   )