diff --git a/GPy/util/__init__.py b/GPy/util/__init__.py
index 3a9fbdb8..4e42d80a 100644
--- a/GPy/util/__init__.py
+++ b/GPy/util/__init__.py
@@ -25,5 +25,6 @@ try:
 except ImportError as e:
     _sympy_available = False
 
-if _sympy_available:
-    import symbolic
+#@NDL: you deleted the symbolic.py file!
+#if _sympy_available:
+    #import symbolic