diff --git a/pymbolic/primitives.py b/pymbolic/primitives.py
index f194874aec4cbeb28a511116548cc97671f07c6d..401b0a56166354bce4e496698cfe7eb688d4ce9d 100644
--- a/pymbolic/primitives.py
+++ b/pymbolic/primitives.py
@@ -131,8 +131,11 @@ class Expression(object):
         return Call(self, pars)
 
     def __getitem__(self, subscript):
-        return Subscript(self, subscript)
-    
+        if subscript == ():
+            return self
+        else:
+            return Subscript(self, subscript)
+
     def __float__(self):
         from pymbolic.mapper.evaluator import evaluate_to_float
         return evaluate_to_float(self)