diff --git a/src/bin/pg_resetxlog/pg_resetxlog.cpp b/src/bin/pg_resetxlog/pg_resetxlog.cpp
index f2a77a5c9..b13c62ed8 100644
--- a/src/bin/pg_resetxlog/pg_resetxlog.cpp
+++ b/src/bin/pg_resetxlog/pg_resetxlog.cpp
@@ -230,7 +230,7 @@ int main(int argc, char* argv[])
                     exit(1);
                 }
                 if ((int32)set_mxoff == -1) {
-                    fprintf(stderr, _("%s: multitransaction offset (-O) must not be -1\n"), progname);
+                    fprintf(stderr, _("%s: the low 32bit of multitransaction offset (-O) must not be ffffffff\n"), progname);
                     exit(1);
                 }
                 break;