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-rw-r--r--src/mongo/db/exec/merge_sort.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mongo/db/exec/merge_sort.cpp b/src/mongo/db/exec/merge_sort.cpp
index f6e0e735a08..aaf0b9ac962 100644
--- a/src/mongo/db/exec/merge_sort.cpp
+++ b/src/mongo/db/exec/merge_sort.cpp
@@ -35,6 +35,11 @@
namespace mongo {
+ using std::auto_ptr;
+ using std::list;
+ using std::string;
+ using std::vector;
+
// static
const char* MergeSortStage::kStageType = "SORT_MERGE";