diff --git a/tests/formatconverter/formatconvertertest.cpp b/tests/formatconverter/formatconvertertest.cpp
index 6f057f790a..ac6d6f1c4a 100644
--- a/tests/formatconverter/formatconvertertest.cpp
+++ b/tests/formatconverter/formatconvertertest.cpp
@@ -279,6 +279,7 @@ void FormatConverterTestCase::check(const wxString& input,
                                     const wxString& expectedWcharWindows)
 {
     // all of them are unused in some build configurations
+    wxUnusedVar(input);
     wxUnusedVar(expectedScanf);
     wxUnusedVar(expectedUtf8);
     wxUnusedVar(expectedWcharUnix);