diff --git a/changes/bug11342 b/changes/bug11342
new file mode 100644
index 0000000000..a52a5515e7
--- /dev/null
+++ b/changes/bug11342
@@ -0,0 +1,4 @@
+  o Minor bugfixes:
+    - When dumping a malformed directory object to disk, save it in binary
+      mode on windows, not text mode. Fixes bug 11342; bugfix on
+      0.2.2.1-alpha.
diff --git a/src/or/routerparse.c b/src/or/routerparse.c
index 422278a5f8..7bf9a4d8e7 100644
--- a/src/or/routerparse.c
+++ b/src/or/routerparse.c
@@ -572,7 +572,7 @@ dump_desc(const char *desc, const char *type)
     char *content = tor_malloc_zero(filelen);
     tor_snprintf(content, filelen, "Unable to parse descriptor of type "
                  "%s:\n%s", type, desc);
-    write_str_to_file(debugfile, content, 0);
+    write_str_to_file(debugfile, content, 1);
     log_info(LD_DIR, "Unable to parse descriptor of type %s. See file "
              "unparseable-desc in data directory for details.", type);
     tor_free(content);