diff --git a/BBGE/Base.cpp b/BBGE/Base.cpp
index 501cb65..525039e 100644
--- a/BBGE/Base.cpp
+++ b/BBGE/Base.cpp
@@ -44,8 +44,11 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include <assert.h>
 
 #ifdef BBGE_BUILD_VFS
-#include "ttvfs.h"
-ttvfs::Root vfs; // extern
+#  include "ttvfs.h"
+#  ifndef VFS_IGNORE_CASE
+#    error Must define VFS_IGNORE_CASE, see VFSDefines.h
+#  endif
+   ttvfs::Root vfs; // extern
 #endif
 
 Vector getDirVector(Direction dir)
diff --git a/ExternalLibs/ttvfs/VFSDefines.h b/ExternalLibs/ttvfs/VFSDefines.h
index 2dd3cdd..d0cf3cc 100644
--- a/ExternalLibs/ttvfs/VFSDefines.h
+++ b/ExternalLibs/ttvfs/VFSDefines.h
@@ -18,7 +18,7 @@
 // (no sane programmer should do this, anyway).
 // However, on non-windows systems this will decrease performance when checking for files
 // on disk (see VFSLoader.cpp).
-//#define VFS_IGNORE_CASE
+#define VFS_IGNORE_CASE
 
 
 /* --- End of config section --- */