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-rw-r--r--examples/cxx/tree/compression/driver.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/examples/cxx/tree/compression/driver.cxx b/examples/cxx/tree/compression/driver.cxx
index b75d0aa..34238b1 100644
--- a/examples/cxx/tree/compression/driver.cxx
+++ b/examples/cxx/tree/compression/driver.cxx
@@ -19,7 +19,7 @@ main (int argc, char* argv[])
{
if (argc != 2)
{
- cerr << "usage: " << argv[0] << " library.xml" << endl;
+ cerr << "usage: " << argv[0] << " library.xml.gz" << endl;
return 1;
}