diff --git a/tests/filename/filenametest.cpp b/tests/filename/filenametest.cpp
index 64b1ed49cf..8c4c591ac4 100644
--- a/tests/filename/filenametest.cpp
+++ b/tests/filename/filenametest.cpp
@@ -380,7 +380,7 @@ TEST_CASE("wxFileName::Normalize", "[filename]")
             wxRegKey::HKLM,
             "SYSTEM\\CurrentControlSet\\Control\\FileSystem"
          ).QueryValue("NtfsDisable8dot3NameCreation", &shortNamesDisabled) &&
-            !shortNamesDisabled )
+            shortNamesDisabled != 1 )
     {
         wxFileName fn("TESTDA~1.CON");
         CHECK( fn.Normalize(wxPATH_NORM_LONG, cwd) );