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-rw-r--r--src/mongo/db/matcher/match_details.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mongo/db/matcher/match_details.cpp b/src/mongo/db/matcher/match_details.cpp
index 1c437129adc..6adcfcdd910 100644
--- a/src/mongo/db/matcher/match_details.cpp
+++ b/src/mongo/db/matcher/match_details.cpp
@@ -36,6 +36,8 @@
namespace mongo {
+ using std::string;
+
MatchDetails::MatchDetails() :
_elemMatchKeyRequested() {
resetOutput();