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-rw-r--r--src/mongo/db/index_names.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mongo/db/index_names.cpp b/src/mongo/db/index_names.cpp
index d3f79886e36..6f0b3f095ab 100644
--- a/src/mongo/db/index_names.cpp
+++ b/src/mongo/db/index_names.cpp
@@ -32,6 +32,8 @@
namespace mongo {
+ using std::string;
+
const string IndexNames::GEO_2D = "2d";
const string IndexNames::GEO_HAYSTACK = "geoHaystack";
const string IndexNames::GEO_2DSPHERE = "2dsphere";