diff --git a/Compiler/library.py b/Compiler/library.py
index 4af9ae1d9..4c9c7fcc7 100644
--- a/Compiler/library.py
+++ b/Compiler/library.py
@@ -1280,8 +1280,9 @@ def _run_and_link(function, g=None):
     pre = copy.copy(g)
     res = function()
     if g:
+        from .types import _single
         for name, var in pre.items():
-            if isinstance(var, program.Tape.Register):
+            if isinstance(var, (program.Tape.Register, _single)):
                 new_var = g[name]
                 if id(new_var) != id(var):
                     new_var.link(var)
diff --git a/Compiler/types.py b/Compiler/types.py
index c7042542d..ffdfee87c 100644
--- a/Compiler/types.py
+++ b/Compiler/types.py
@@ -3353,6 +3353,9 @@ def __ne__(self, other):
         op.__doc__ = __eq__.__doc__
     del op
 
+    def link(self, other):
+        self.v.link(other.v)
+
 class _fix(_single):
     """ Secret fixed point type. """
     __slots__ = ['v', 'f', 'k']