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-rw-r--r--src/mongo/db/prefetch.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/prefetch.cpp b/src/mongo/db/prefetch.cpp
index 2af66b36cdf..776afc9c81d 100644
--- a/src/mongo/db/prefetch.cpp
+++ b/src/mongo/db/prefetch.cpp
@@ -135,7 +135,7 @@ namespace mongo {
_dummy_char += *(result.objdata() + i);
}
// hit the last page, in case we missed it above
- _dummy_char += *(result.objdata() + result.objsize());
+ _dummy_char += *(result.objdata() + result.objsize() - 1);
}
}
catch(const DBException& e) {