diff --git a/tg2sip/gateway.cpp b/tg2sip/gateway.cpp
index 0e79fcb..104260d 100755
--- a/tg2sip/gateway.cpp
+++ b/tg2sip/gateway.cpp
@@ -253,7 +253,7 @@ namespace state_machine::actions {
             ctx.ext_phone = ext.substr(1, std::string::npos);
         } else if (is_digits(ext)) {
             try {
-                ctx.user_id = std::stoi(ext);
+                ctx.user_id = std::stol(ext);
             } catch (const std::invalid_argument &e) {
                 ext_valid = false;
             } catch (const std::out_of_range &e) {
@@ -906,4 +906,4 @@ void Gateway::process_event(const TSipEvent &event) {
         delete *iter;
         bridges.erase(iter);
     }
-}
\ No newline at end of file
+}