diff --git a/lib/clang/libllvmminimal/Makefile b/lib/clang/libllvmminimal/Makefile
index 7358d625b485..445e91e45cc4 100644
--- a/lib/clang/libllvmminimal/Makefile
+++ b/lib/clang/libllvmminimal/Makefile
@@ -7,6 +7,9 @@ INTERNALLIB=
 
 SRCDIR=		lib
 SRCS+=		Support/APInt.cpp
+.if ${MACHINE_ARCH:Mpowerpc*} != ""
+SRCS+=		Support/Atomic.cpp
+.endif
 SRCS+=		Support/CommandLine.cpp
 SRCS+=		Support/ConvertUTF.c
 SRCS+=		Support/ConvertUTFWrapper.cpp