diff --git a/lib/Target/ARM/CMakeLists.txt b/lib/Target/ARM/CMakeLists.txt
index e665ed94d09..8f0c39567c9 100644
--- a/lib/Target/ARM/CMakeLists.txt
+++ b/lib/Target/ARM/CMakeLists.txt
@@ -25,4 +25,5 @@ add_llvm_target(ARMCodeGen
   ARMTargetAsmInfo.cpp
   ARMTargetMachine.cpp
   ThumbInstrInfo.cpp
+  ThumbRegisterInfo.cpp
   )