diff --git a/include/boost/exception/diagnostic_information.hpp b/include/boost/exception/diagnostic_information.hpp
index cea07df..2c66220 100644
--- a/include/boost/exception/diagnostic_information.hpp
+++ b/include/boost/exception/diagnostic_information.hpp
@@ -23,7 +23,7 @@ boost
         struct
         enable_boost_exception_overload
             {
-            typedef struct yes { char q[100]; };
+            struct yes { char q[100]; };
             typedef char no;
             static yes check(exception const *);
             static no check(...);
@@ -34,7 +34,7 @@ boost
         struct
         enable_std_exception_overload
             {
-            typedef struct yes { char q[100]; };
+            struct yes { char q[100]; };
             typedef char no;
             static yes check(std::exception const *);
             static no check(...);