diff --git a/transformations.py b/transformations.py
index f83fa9c6495295145e38de19a949996e7c708ae2..b39bd92b2dd289014c85a64146c78e5bfa94c7f9 100644
--- a/transformations.py
+++ b/transformations.py
@@ -222,6 +222,7 @@ def resolveFieldAccesses(astNode, readOnlyFieldNames=set(), fieldToBasePointerIn
 
             dtype = DataType(field.dtype)
             dtype.alias = False
+            dtype.ptr = True
             if field.name in readOnlyFieldNames:
                 dtype.const = True
 
diff --git a/types.py b/types.py
index e4f579e6804f5f2ea3c151d5e33ee4614b483113..2da1e3fc45c891d175d860b54d115434cddd4e7a 100644
--- a/types.py
+++ b/types.py
@@ -22,7 +22,7 @@ class TypedSymbol(sp.Symbol):
 
     def _hashable_content(self):
         superClassContents = list(super(TypedSymbol, self)._hashable_content())
-        t = tuple(superClassContents + [hash(self._dtype)])
+        t = tuple(superClassContents + [hash(repr(self._dtype))])
         return t
 
     def __getnewargs__(self):
@@ -37,10 +37,12 @@ class DataType(object):
     def __init__(self, dtype):
         self.alias = True
         self.const = False
+        self.ptr = False
         if isinstance(dtype, str):
             self.dtype = _dtype_dict[dtype]
         else:
             self.dtype = dtype
 
     def __repr__(self):
-        return "{!s} {!s} {!s}".format("const" if self.const else "", "__restrict__" if not self.alias else "", _c_dtype_dict[self.dtype])
+        return "{!s} {!s}{!s} {!s}".format("const" if self.const else "", _c_dtype_dict[self.dtype],
+                                           "*" if self.ptr else "", "__restrict__" if not self.alias else "")