diff --git a/include/wx/file.h b/include/wx/file.h
index 631f12c3c1..6d39f01bda 100644
--- a/include/wx/file.h
+++ b/include/wx/file.h
@@ -39,9 +39,11 @@
 #define wxS_IWOTH 00002
 #define wxS_IXOTH 00001
 
-// default mode for the new files: corresponds to umask 022
-#define wxS_DEFAULT   (wxS_IRUSR | wxS_IWUSR | wxS_IRGRP | wxS_IWGRP |\
-                       wxS_IROTH | wxS_IWOTH)
+// default mode for the new files: allow reading/writing them to everybody but
+// the effective file mode will be set after anding this value with umask and
+// so won't include wxS_IW{GRP,OTH} for the default 022 umask value
+#define wxS_DEFAULT \
+    (wxS_IRUSR | wxS_IWUSR | wxS_IRGRP | wxS_IWGRP | wxS_IROTH | wxS_IWOTH)
 
 // ----------------------------------------------------------------------------
 // class wxFile: raw file IO