diff --git a/include/fc/io/raw.hpp b/include/fc/io/raw.hpp
index 15c6bad..c9d344d 100644
--- a/include/fc/io/raw.hpp
+++ b/include/fc/io/raw.hpp
@@ -261,6 +261,7 @@ namespace fc {
     template<typename Stream> inline void unpack( Stream& s, std::vector<char>& value, uint32_t _max_depth ) {
        FC_ASSERT( _max_depth > 0 );
        unsigned_int size; fc::raw::unpack( s, size, _max_depth - 1 );
+       FC_ASSERT( size.value < MAX_ARRAY_ALLOC_SIZE );
        value.resize(size.value);
        if( value.size() )
           s.read( value.data(), value.size() );
diff --git a/include/fc/io/raw_fwd.hpp b/include/fc/io/raw_fwd.hpp
index 638e559..8267afc 100644
--- a/include/fc/io/raw_fwd.hpp
+++ b/include/fc/io/raw_fwd.hpp
@@ -1,4 +1,4 @@
-#pragma once
+#pragma once 
 #include <fc/config.hpp>
 #include <fc/container/flat_fwd.hpp>
 #include <fc/container/deque_fwd.hpp>
@@ -12,6 +12,8 @@
 #include <unordered_map>
 #include <set>
 
+#define MAX_ARRAY_ALLOC_SIZE (1024*1024*10)
+
 namespace fc {
    class time_point;
    class time_point_sec;