diff --git a/src/generic/filedlgg.cpp b/src/generic/filedlgg.cpp
index 638c1173f1..14a2ca9324 100644
--- a/src/generic/filedlgg.cpp
+++ b/src/generic/filedlgg.cpp
@@ -135,7 +135,7 @@ int wxCALLBACK wxFileDataTimeCompare( long data1, long data2, long data)
      return fd1->GetDateTime().IsLaterThan(fd2->GetDateTime()) ? int(data) : -int(data);
 }
 
-#if defined(__UNIX__) && !defined(__OS2__)
+#if defined(__UNIX__) && !defined(__OS2__) && !defined(__CYGWIN__)
 #define IsTopMostDir(dir)   (dir == wxT("/"))
 #endif