diff --git a/lib/MC/CMakeLists.txt b/lib/MC/CMakeLists.txt
index c8d6e942472..5eac6e0e537 100644
--- a/lib/MC/CMakeLists.txt
+++ b/lib/MC/CMakeLists.txt
@@ -2,7 +2,10 @@ add_llvm_library(LLVMMC
   MCAsmLexer.cpp
   MCAsmParser.cpp
   MCAsmStreamer.cpp
+  MCAssembler.cpp
   MCContext.cpp
+  MCMachOStreamer.cpp
+  MCNullStreamer.cpp
   MCSection.cpp
   MCSectionELF.cpp
   MCSectionMachO.cpp