diff --git a/projects/CMakeLists.txt b/projects/CMakeLists.txt
index 428ce84efd7..d3b2fc37af7 100644
--- a/projects/CMakeLists.txt
+++ b/projects/CMakeLists.txt
@@ -7,7 +7,8 @@ foreach(entry ${entries})
     if((NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/compiler-rt) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/dragonegg) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libcxx) AND
-       (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libcxxabi))
+       (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libcxxabi) AND
+       (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libunwind))
       add_subdirectory(${entry})
     endif()
   endif()
@@ -23,6 +24,7 @@ if(${LLVM_BUILD_RUNTIME})
     # first.
     add_llvm_external_project(libcxxabi)
     add_llvm_external_project(libcxx)
+    add_llvm_external_project(libunwind)
   endif()
   if(NOT LLVM_BUILD_EXTERNAL_COMPILER_RT)
     add_llvm_external_project(compiler-rt)