diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ebc726c1a9..7c49f13610b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,7 @@ endif()
 # LLVM_EXTERNAL_${project}_SOURCE_DIR using LLVM_ALL_PROJECTS
 # This allows an easy way of setting up a build directory for llvm and another
 # one for llvm+clang+... using the same sources.
-set(LLVM_ALL_PROJECTS "clang;clang-tools-extra;compiler-rt;debuginfo-tests;libclc;libcxx;libcxxabi;libunwind;lld;lldb;llgo;openmp;parallel-libs;polly;pstl")
+set(LLVM_ALL_PROJECTS "clang;clang-tools-extra;compiler-rt;debuginfo-tests;libc;libclc;libcxx;libcxxabi;libunwind;lld;lldb;llgo;openmp;parallel-libs;polly;pstl")
 set(LLVM_ENABLE_PROJECTS "" CACHE STRING
 	"Semicolon-separated list of projects to build (${LLVM_ALL_PROJECTS}), or \"all\".")
 if( LLVM_ENABLE_PROJECTS STREQUAL "all" )
diff --git a/projects/CMakeLists.txt b/projects/CMakeLists.txt
index 47ceb9ea2f3..7a948bdc850 100644
--- a/projects/CMakeLists.txt
+++ b/projects/CMakeLists.txt
@@ -31,6 +31,7 @@ if(${LLVM_BUILD_RUNTIME})
     # dependent projects can see the target names of their dependencies.
     add_llvm_external_project(libunwind)
     add_llvm_external_project(pstl)
+    add_llvm_external_project(libc)
     add_llvm_external_project(libcxxabi)
     add_llvm_external_project(libcxx)
   endif()