diff --git a/boost/archive/iterators/base64_from_binary.hpp b/boost/archive/iterators/base64_from_binary.hpp
index 00c4e10c10..bd0b38fa57 100644
--- a/boost/archive/iterators/base64_from_binary.hpp
+++ b/boost/archive/iterators/base64_from_binary.hpp
@@ -41,7 +41,7 @@ template<class CharType>
 struct from_6_bit {
     typedef CharType result_type;
     CharType operator()(CharType t) const{
-        const char * lookup_table =
+        static const char * lookup_table =
             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
             "abcdefghijklmnopqrstuvwxyz"
             "0123456789"
diff --git a/boost/archive/iterators/binary_from_base64.hpp b/boost/archive/iterators/binary_from_base64.hpp
index 2eb7828251..5aeccb3aab 100644
--- a/boost/archive/iterators/binary_from_base64.hpp
+++ b/boost/archive/iterators/binary_from_base64.hpp
@@ -37,7 +37,7 @@ template<class CharType>
 struct to_6_bit {
     typedef CharType result_type;
     CharType operator()(CharType t) const{
-        const signed char lookup_table[] = {
+        static const signed char lookup_table[] = {
             -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
             -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
             -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,