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-rw-r--r--src/google/protobuf/stubs/once.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/google/protobuf/stubs/once.h b/src/google/protobuf/stubs/once.h
index cc62bbaa..1f082c37 100644
--- a/src/google/protobuf/stubs/once.h
+++ b/src/google/protobuf/stubs/once.h
@@ -79,6 +79,7 @@
#define GOOGLE_PROTOBUF_STUBS_ONCE_H__
#include <google/protobuf/stubs/atomicops.h>
+#include <google/protobuf/stubs/callback.h>
#include <google/protobuf/stubs/common.h>
namespace google {