diff --git a/asn.cpp b/asn.cpp
index 8ae1ad65..27b49d9b 100644
--- a/asn.cpp
+++ b/asn.cpp
@@ -123,7 +123,7 @@ size_t BERDecodeOctetString(BufferedTransformation &bt, SecByteBlock &str)
 	if (!BERLengthDecode(bt, bc))
 		BERDecodeError();
 
-	str.resize(bc);
+	str.New(bc);
 	if (bc != bt.Get(str, bc))
 		BERDecodeError();
 	return bc;