diff --git a/jedi/api/classes.py b/jedi/api/classes.py
index 9a3df1dd..00eefa70 100644
--- a/jedi/api/classes.py
+++ b/jedi/api/classes.py
@@ -544,7 +544,9 @@ class Definition(use_metaclass(CachedMetaClass, BaseDefinition)):
             # only show module name
             d = 'module %s' % self.module_name
         elif isinstance(d, pr.Param):
-            d = d.get_code()
+            d = d.get_code().strip()
+            if d.endswith(','):
+                d = d[:-1]  # Remove the comma.
         else:  # ExprStmt
             try:
                 first_leaf = d.first_leaf()
diff --git a/test/test_api/test_api_classes.py b/test/test_api/test_api_classes.py
index a4c28f8f..206e2f0b 100644
--- a/test/test_api/test_api_classes.py
+++ b/test/test_api/test_api_classes.py
@@ -158,6 +158,15 @@ def test_signature_params():
     check(Script(s + '\nbar=foo\nbar').goto_assignments())
 
 
+def test_param_endings():
+    """
+    Params should be represented without the comma and whitespace they have
+    around them.
+    """
+    sig = Script('def x(a, b=5, c=""): pass\n x(').call_signatures()[0]
+    assert [p.description for p in sig.params] == ['a', 'b=5', 'c=""']
+
+
 class TestIsDefinition(TestCase):
     def _def(self, source, index=-1):
         return names(dedent(source), references=True, all_scopes=True)[index]