diff --git a/pymath/polynom.py b/pymath/polynom.py
index fc570a5..21dc7b9 100644
--- a/pymath/polynom.py
+++ b/pymath/polynom.py
@@ -68,7 +68,11 @@ class Polynom(object):
         :returns: Expression ready to be simplify
 
         """
-        postfix_exp = [value if i==self._letter else i for i in self.postfix]
+        if isNumber(value):
+            postfix_exp = [value if i==self._letter else i for i in self.postfix]
+        else:
+            postfix_exp = [Expression(value) if i==self._letter else i for i in self.postfix]
+
         return Expression(postfix_exp)
 
     def feed_coef(self, l_coef):
diff --git a/test/test_polynom.py b/test/test_polynom.py
index a21ba0a..00b96c5 100644
--- a/test/test_polynom.py
+++ b/test/test_polynom.py
@@ -43,6 +43,10 @@ class TestPolynom(unittest.TestCase):
         p = Polynom([-1])
         self.assertEqual(p(3).simplified(), -1)
 
+    def test_eval_poly(self):
+        p = Polynom([1, 2])
+        self.assertEqual(p("1+h").simplified(), Polynom([3,2]))
+
     #def test_print(self):
     #    p = Polynom([1,2,3])
     #    ans = "1 + 2 x + 3 x^2"