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-rw-r--r--src/mongo/db/pipeline/expression.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/expression.cpp b/src/mongo/db/pipeline/expression.cpp
index ed0c8cbde12..5d61245b8ec 100644
--- a/src/mongo/db/pipeline/expression.cpp
+++ b/src/mongo/db/pipeline/expression.cpp
@@ -48,7 +48,11 @@
namespace mongo {
using namespace mongoutils;
+
using boost::intrusive_ptr;
+ using std::set;
+ using std::string;
+ using std::vector;
/// Helper function to easily wrap constants with $const.
static Value serializeConstant(Value val) {