diff --git a/lib/CodeGen/CMakeLists.txt b/lib/CodeGen/CMakeLists.txt
index 8146ae98b6e..17072d30d01 100644
--- a/lib/CodeGen/CMakeLists.txt
+++ b/lib/CodeGen/CMakeLists.txt
@@ -37,7 +37,6 @@ add_llvm_library(LLVMCodeGen
   MachineSSAUpdater.cpp
   MachineSink.cpp
   MachineVerifier.cpp
-  MaxStackAlignment.cpp
   ObjectCodeEmitter.cpp
   OcamlGC.cpp
   OptimizeExts.cpp