diff --git a/source/forstio/message.h b/source/forstio/message.h
index 2001a60..475d32c 100644
--- a/source/forstio/message.h
+++ b/source/forstio/message.h
@@ -106,7 +106,7 @@ public:
 			SchemaIsArray<
 				typename MessageParameterPackType<i, V...>::Type>::Value,
 			typename Container::template ElementType<i>::Builder>::type
-		init(size_t size) {
+		init(size_t size = 0) {
 			auto array_builder =
 				typename Container::template ElementType<i>::Builder{
 					message.container.template get<i>(), size};
@@ -234,7 +234,7 @@ public:
 			SchemaIsArray<
 				typename MessageParameterPackType<i, V...>::Type>::Value,
 			typename Container::template ElementType<i>::Builder>::type
-		init(size_t size) {
+		init(size_t size = 0) {
 			return typename Container::template ElementType<i>::Builder{
 				message.container.template get<i>(), size};
 		}
@@ -332,6 +332,8 @@ public:
 		}
 
 		size_t size() const { return message.container.size(); }
+
+		void resize(size_t size) { message.container.resize(size); }
 	};
 
 	class Reader {
@@ -394,7 +396,7 @@ public:
 			SchemaIsArray<
 				typename MessageParameterPackType<i, T...>::Type>::Value,
 			typename Container::template ElementType<i>::Builder>::type
-		init(size_t size) {
+		init(size_t size = 0) {
 			return typename Container::template ElementType<i>::Builder{
 				message.container.template get<i>(), size};
 		}
diff --git a/source/forstio/proto_kel.h b/source/forstio/proto_kel.h
index 1f79d19..51e25c7 100644
--- a/source/forstio/proto_kel.h
+++ b/source/forstio/proto_kel.h
@@ -4,8 +4,6 @@
 #include "message.h"
 #include "stream_endian.h"
 
-#include <iostream>
-
 namespace saw {
 /// @todo replace types with these
 /*
@@ -493,6 +491,8 @@ struct ProtoKelDecodeImpl<Message<schema::Array<T>, Container>> {
 			}
 		}
 
+		data.resize(array_length);
+
 		for (size_t i = 0; i < array_length; ++i) {
 			Error error =
 				ProtoKelDecodeImpl<typename Container::ElementType>::decode(