1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Enum.h b/lib/Enum.h
index df91aa3..ba410f9 100644
--- a/lib/Enum.h
+++ b/lib/Enum.h
@@ -312,7 +312,7 @@ name(#EnumName),defaultValue(initWith)
  * Writes enumeration's string representation.
  */
 template <typename E>
-inline std::ostream& operator << (ostream& out, const Enum<E> &e) {
+inline std::ostream& operator << (std::ostream& out, const Enum<E> &e) {
     return out << _(e.toString().c_str());
 }