diff --git a/src/session.c b/src/session.c
index 6885866f..31bb2a79 100644
--- a/src/session.c
+++ b/src/session.c
@@ -270,7 +270,9 @@ void ssh_free(ssh_session session) {
       ssh_list_free(session->opts.identity);
   }
 
+#ifndef _WIN32
   ssh_agent_state_free (session->agent_state);
+#endif
   session->agent_state = NULL;
 
   SAFE_FREE(session->auth_auto_state);