diff --git a/db/version_set.cc b/db/version_set.cc
index 20de9f6e3a3ad271a73ad152f178a6100e3362e0..ebd1380461cc5a809f423d39c5e69f542f087935 100644
--- a/db/version_set.cc
+++ b/db/version_set.cc
@@ -1430,9 +1430,9 @@ Status VersionSet::Recover() {
       if (s.ok()) {
         if (edit.has_comparator_ &&
             edit.comparator_ != icmp_.user_comparator()->Name()) {
-          s = Status::InvalidArgument(
-              edit.comparator_ + "does not match existing comparator ",
-              icmp_.user_comparator()->Name());
+          s = Status::InvalidArgument(icmp_.user_comparator()->Name(),
+                                      "does not match existing comparator " +
+                                      edit.comparator_);
         }
       }
 
@@ -1548,9 +1548,9 @@ Status VersionSet::DumpManifest(Options& options, std::string& dscname,
       if (s.ok()) {
         if (edit.has_comparator_ &&
             edit.comparator_ != icmp_.user_comparator()->Name()) {
-          s = Status::InvalidArgument(
-              edit.comparator_ + "does not match existing comparator ",
-              icmp_.user_comparator()->Name());
+          s = Status::InvalidArgument(icmp_.user_comparator()->Name(),
+                                      "does not match existing comparator " +
+                                      edit.comparator_);
         }
       }
 
diff --git a/util/comparator.cc b/util/comparator.cc
index 93b4ffafbb69edceb6ce0afa3ab7e75a90dd0e08..6ba1cacfd089654d2893f7ee38bab1a0dfffde63 100644
--- a/util/comparator.cc
+++ b/util/comparator.cc
@@ -19,7 +19,7 @@ class BytewiseComparatorImpl : public Comparator {
   BytewiseComparatorImpl() { }
 
   virtual const char* Name() const {
-    return "rocksdb.BytewiseComparator";
+    return "leveldb.BytewiseComparator";
   }
 
   virtual int Compare(const Slice& a, const Slice& b) const {