diff --git a/lib/Target/ARM/CMakeLists.txt b/lib/Target/ARM/CMakeLists.txt
index 2ac40f53549..e665ed94d09 100644
--- a/lib/Target/ARM/CMakeLists.txt
+++ b/lib/Target/ARM/CMakeLists.txt
@@ -24,4 +24,5 @@ add_llvm_target(ARMCodeGen
   ARMSubtarget.cpp
   ARMTargetAsmInfo.cpp
   ARMTargetMachine.cpp
+  ThumbInstrInfo.cpp
   )