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-rw-r--r--src/mongo/s/grid.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mongo/s/grid.h b/src/mongo/s/grid.h
index a990143a4c1..3059ce733b4 100644
--- a/src/mongo/s/grid.h
+++ b/src/mongo/s/grid.h
@@ -31,6 +31,7 @@
#include <memory>
#include "mongo/db/repl/optime.h"
+#include "mongo/stdx/mutex.h"
namespace mongo {