diff --git a/jedi/api/__init__.py b/jedi/api/__init__.py
index 12e00786..aa40176b 100644
--- a/jedi/api/__init__.py
+++ b/jedi/api/__init__.py
@@ -532,7 +532,6 @@ class Script(object):
 
         :rtype: list of :class:`classes.CallSignature`
         """
-
         user_stmt = self._parser.user_stmt_with_whitespace()
         call, index = helpers.func_call_and_param_index(user_stmt, self._pos)
         if call is None:
@@ -543,9 +542,10 @@ class Script(object):
             origins = cache.cache_call_signatures(_callable, user_stmt)
         debug.speed('func_call followed')
 
-        return [classes.CallSignature(self._evaluator, o, call, index) for o in origins
-                if o.isinstance(er.Function, er.Instance, er.Class)
-                or isinstance(o, compiled.CompiledObject) and o.type() != 'module']
+        print([classes.CallSignature(self._evaluator, o, call, index)
+                for o in origins])
+        return [classes.CallSignature(self._evaluator, o, call, index)
+                for o in origins if o.is_callable()]
 
 
 class Interpreter(Script):
diff --git a/jedi/evaluate/compiled/__init__.py b/jedi/evaluate/compiled/__init__.py
index b05d9e18..33b95b73 100644
--- a/jedi/evaluate/compiled/__init__.py
+++ b/jedi/evaluate/compiled/__init__.py
@@ -138,6 +138,10 @@ class CompiledObject(Base):
     def get_imports(self):
         return []  # Builtins don't have imports
 
+    def is_callable(self):
+        """Check if the object has a ``__call__`` method."""
+        return hasattr(self.obj, '__call__')
+
 
 class CompiledName(object):
     def __init__(self, obj, name):
diff --git a/jedi/evaluate/representation.py b/jedi/evaluate/representation.py
index 75f4dcc5..5cefcad4 100644
--- a/jedi/evaluate/representation.py
+++ b/jedi/evaluate/representation.py
@@ -160,6 +160,13 @@ class Instance(use_metaclass(CachedMetaClass, Executable)):
             names.append(InstanceElement(self._evaluator, self, var, True))
         yield self, names
 
+    def is_callable(self):
+        try:
+            self.get_subscope_by_name('__call__')
+            return True
+        except KeyError:
+            return False
+
     def get_index_types(self, index=None):
         args = [] if index is None else [index]
         try:
@@ -232,6 +239,9 @@ class InstanceElement(use_metaclass(CachedMetaClass, pr.Base)):
     def isinstance(self, *cls):
         return isinstance(self.var, cls)
 
+    def is_callable(self):
+        return self.var.is_callable()
+
     def __repr__(self):
         return "<%s of %s>" % (type(self).__name__, self.var)
 
@@ -298,6 +308,9 @@ class Class(use_metaclass(CachedMetaClass, pr.IsScope)):
                 return sub
         raise KeyError("Couldn't find subscope.")
 
+    def is_callable(self):
+        return True
+
     @common.safe_property
     def name(self):
         return self.base.name
@@ -379,6 +392,9 @@ class Function(use_metaclass(CachedMetaClass, pr.IsScope)):
     def get_magic_function_scope(self):
         return compiled.magic_function_class
 
+    def is_callable(self):
+        return True
+
     def __getattr__(self, name):
         return getattr(self.base_func, name)
 
diff --git a/jedi/parser/representation.py b/jedi/parser/representation.py
index 185154d5..6894948b 100644
--- a/jedi/parser/representation.py
+++ b/jedi/parser/representation.py
@@ -118,6 +118,13 @@ class Base(object):
             scope = scope.parent
         return scope
 
+    def is_callable(self):
+        """
+        By default parser objects are not callable, we make them callable by
+        the ``evaluate.representation`` objects.
+        """
+        return False
+
     def space(self, from_pos, to_pos):
         """Return the space between two tokens"""
         linecount = to_pos[0] - from_pos[0]
diff --git a/test/test_api/test_call_signatures.py b/test/test_api/test_call_signatures.py
index a1f12d73..6d50f12e 100644
--- a/test/test_api/test_call_signatures.py
+++ b/test/test_api/test_call_signatures.py
@@ -206,12 +206,11 @@ def test_signature_is_definition():
 
 def test_no_signature():
     # str doesn't have a __call__ method
-    assert Script('str()(').call_signatures == []
+    assert Script('str()(').call_signatures() == []
 
     s = dedent("""\
     class X():
         pass
-    X()(
-    """)
-    assert Script(s).call_signatures == []
-    assert len(Script(s, column=2).call_signatures) == 1
+    X()(""")
+    assert Script(s).call_signatures() == []
+    assert len(Script(s, column=2).call_signatures()) == 1