diff --git a/src/bincimapmime/convert.h b/src/bincimapmime/convert.h
index 69bf8f03..d1ab0231 100644
--- a/src/bincimapmime/convert.h
+++ b/src/bincimapmime/convert.h
@@ -241,13 +241,13 @@ namespace Binc {
   //----------------------------------------------------------------------
   inline std::string toCanonMailbox(const std::string &s_in)
   {
-    if (s_in.find("..") != std::string::npos) return string();
+    if (s_in.find("..") != std::string::npos) return std::string();
 
     if (s_in.length() >= 5) {
       std::string a = s_in.substr(0, 5);
       uppercase(a);
       return a == "INBOX" ?
-	a + (s_in.length() > 5 ? s_in.substr(5) : string() : s_in;
+	a + (s_in.length() > 5 ? s_in.substr(5) : std::string()) : s_in;
     }
     
     return s_in;