1 files changed, 1 insertions, 1 deletions

diff --git a/lib/secret.cc b/lib/secret.cc
index d538890..3f1e39c 100644
--- a/lib/secret.cc
+++ b/lib/secret.cc
@@ -7,13 +7,13 @@
 namespace opkele {
     using namespace std;
 
     template<class __a1,class __a2,class __r>
         struct bitwise_xor : public binary_function<__a1,__a2,__r> {
             __r operator() (const __a1& a1,const __a2& a2) const {
-                return a1^a2;
+                return (__r)(a1^a2);
             }
         };
 
     void secret_t::enxor_to_base64(const unsigned char *key_d,string& rv) const {
         vector<unsigned char> tmp;
         transform(