1 files changed, 2 insertions, 0 deletions
diff --git a/absl/base/call_once.h b/absl/base/call_once.h
index 532ee2e3..37b6608a 100644
--- a/absl/base/call_once.h
+++ b/absl/base/call_once.h
@@ -39,6 +39,7 @@
 #include "absl/base/port.h"
 
 namespace absl {
+inline namespace lts_2018_06_20 {
 
 class once_flag;
 
@@ -211,6 +212,7 @@ void call_once(absl::once_flag& flag, Callable&& fn, Args&&... args) {
   }
 }
 
+}  // inline namespace lts_2018_06_20
 }  // namespace absl
 
 #endif  // ABSL_BASE_CALL_ONCE_H_