1 files changed, 1 insertions, 0 deletions
diff --git a/src/mongo/db/index.cpp b/src/mongo/db/index.cpp
index 294629dd945..81bab1ecb0b 100644
--- a/src/mongo/db/index.cpp
+++ b/src/mongo/db/index.cpp
@@ -431,6 +431,7 @@ namespace mongo {
             BSONObj o = io;
             if ( plugin ) {
                 o = plugin->adjustIndexSpec(o);
+                key = o.getObjectField("key");
             }
             BSONObjBuilder b;
             int v = DefaultIndexVersionNumber;