diff --git a/gestion/gest_crans_lc.py b/gestion/gest_crans_lc.py
index 164b3ab2..eb674b26 100755
--- a/gestion/gest_crans_lc.py
+++ b/gestion/gest_crans_lc.py
@@ -147,6 +147,20 @@ class TailCall(object) :
         self.args = args
         self.kwargs = kwargs
 
+        self.check(self.args, self.kwargs)
+
+    def check(self, args, kwargs):
+        call = self.call
+        if isinstance(call, TailCaller):
+            call = call.f
+        targs = inspect.getargspec(call)
+        if targs.varargs is not None:
+            if len(args) + len(kwargs) > len(targs.args):
+                raise TypeError("%s() takes at most %s arguments (%s given)" % (call.func_name, len(targs.args), len(args) + len(kwargs)))
+            for key in kwargs:
+                if key not in targs.args:
+                    raise TypeError("%s() got an unexpected keyword argument '%s'" % (call.func_name, key))
+
     def __str__(self):
         return "TailCall<%s(%s%s%s)>" % (
            self.call.func_name,
@@ -167,6 +181,10 @@ class TailCall(object) :
         return result
 
     def __call__(self, *args, **kwargs):
+        tmpkwargs={}
+        tmpkwargs.update(self.kwargs)
+        tmpkwargs.update(kwargs)
+        self.check(self.args + args, tmpkwargs)
         self.kwargs.update(kwargs)
         self.args = self.args + args
         return self