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-rw-r--r--tests/wildcard/driver.cxx2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/wildcard/driver.cxx b/tests/wildcard/driver.cxx
index 9e3d1b7..502726f 100644
--- a/tests/wildcard/driver.cxx
+++ b/tests/wildcard/driver.cxx
@@ -65,6 +65,8 @@ int
main (int argc, const char* argv[])
try
{
+ using butl::optional;
+
assert (argc >= 2);
string op (argv[1]);