diff --git a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
index 548f7b9cdd5f3..b4b189b6708e2 100644
--- a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
@@ -187,9 +187,6 @@ if (target_os == "win") {
     "support/win32/thread_win32.cpp",
   ]
 }
-if (target_os == "solaris") {
-  cxx_sources += [ "support/solaris/xlocale.cpp" ]
-}
 if (target_os == "zos") {
   cxx_sources += [
     "support/ibm/mbsnrtowcs.cpp",