diff --git a/vendored/libfuse/util/fusermount.cpp b/vendored/libfuse/util/fusermount.cpp
index 23b1be0b..0325fae7 100644
--- a/vendored/libfuse/util/fusermount.cpp
+++ b/vendored/libfuse/util/fusermount.cpp
@@ -688,7 +688,7 @@ static int get_mnt_opts(int flags, char *opts, char **mnt_optsp)
 
     if (add_option(mnt_optsp, "user=", strlen(user)) == -1)
       return -1;
-    strcat(*mnt_optsp, user);
+    strncat(*mnt_optsp,user,strlen(user));
   }
   return 0;
 }