diff --git a/include/boost/regex/v4/perl_matcher_non_recursive.hpp b/include/boost/regex/v4/perl_matcher_non_recursive.hpp
index 93750247..6af90fb7 100644
--- a/include/boost/regex/v4/perl_matcher_non_recursive.hpp
+++ b/include/boost/regex/v4/perl_matcher_non_recursive.hpp
@@ -956,7 +956,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_recursion()
    // See if we've seen this recursion before at this location, if we have then
    // we need to prevent infinite recursion:
    //
-   for(std::vector<recursion_info<results_type> >::const_reverse_iterator i = recursion_stack.rbegin(); i != recursion_stack.rend(); ++i)
+   for(typename std::vector<recursion_info<results_type> >::const_reverse_iterator i = recursion_stack.rbegin(); i != recursion_stack.rend(); ++i)
    {
       if(i->idx == static_cast<const re_brace*>(static_cast<const re_jump*>(pstate)->alt.p)->index)
       {
diff --git a/include/boost/regex/v4/perl_matcher_recursive.hpp b/include/boost/regex/v4/perl_matcher_recursive.hpp
index ef163d75..023e62dd 100644
--- a/include/boost/regex/v4/perl_matcher_recursive.hpp
+++ b/include/boost/regex/v4/perl_matcher_recursive.hpp
@@ -904,7 +904,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_recursion()
    // See if we've seen this recursion before at this location, if we have then
    // we need to prevent infinite recursion:
    //
-   for(std::vector<recursion_info<results_type> >::const_reverse_iterator i = recursion_stack.rbegin(); i != recursion_stack.rend(); ++i)
+   for(typename std::vector<recursion_info<results_type> >::const_reverse_iterator i = recursion_stack.rbegin(); i != recursion_stack.rend(); ++i)
    {
       if(i->idx == static_cast<const re_brace*>(static_cast<const re_jump*>(pstate)->alt.p)->index)
       {