diff --git a/NEWS b/NEWS
index 5e8b6febd..cd8da113b 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,7 @@ ver 0.20.10 (not yet released)
   - ffmpeg: support MusicBrainz ID3v2 tags
 * tags
   - aiff: fix FORM chunk size endianess (is big-endian)
+* fix crash on Windows
 
 ver 0.20.9 (2017/06/04)
 * decoder
diff --git a/src/util/FormatString.cxx b/src/util/FormatString.cxx
index ceb7d48e0..57ea57525 100644
--- a/src/util/FormatString.cxx
+++ b/src/util/FormatString.cxx
@@ -57,7 +57,7 @@ FormatStringV(const char *fmt, va_list args) noexcept
 	const size_t length = strlen(buffer);
 	char *p = new char[length + 1];
 	memcpy(p, buffer, length + 1);
-	return AllocatedString<>::Donate(buffer);
+	return AllocatedString<>::Donate(p);
 #endif
 }