1 files changed, 7 insertions, 0 deletions
diff --git a/src/mongo/base/string_data.cpp b/src/mongo/base/string_data.cpp
index 8a65e30c9fa..31ab21f1144 100644
--- a/src/mongo/base/string_data.cpp
+++ b/src/mongo/base/string_data.cpp
@@ -16,6 +16,7 @@
 #include "mongo/base/string_data.h"
 
 #include <ostream>
+#include <third_party/murmurhash3/MurmurHash3.h>
 
 namespace mongo {
 
@@ -23,4 +24,10 @@ namespace mongo {
         return stream.write(value.rawData(), value.size());
     }
 
+    size_t StringData::Hasher::operator() (const StringData& str) const {
+        unsigned out;
+        MurmurHash3_x86_32(str.rawData(), str.size(), 0, &out);
+        return out;
+    }
+
 } // namespace mongo