diff --git a/README b/README
index 0d3f61eb..099caa22 100644
--- a/README
+++ b/README
@@ -33,6 +33,11 @@ Options:
                  causes extra lines to be printed to make line numbers
                  match. When dumping the ast, this causes line numbers to be
                  printed even when using --comparable.
+  --no-pyexpr    Only for dumping, disable special handling of PyExpr objects,
+                 instead printing them as strings. This is useful when comparing
+                 dumps from different versions of Ren'Py. It should only be used
+                 if necessary, since it will cause loss of information such as
+                 line numbers.
 
 Usage: [python2] unrpyc.py [options] script1 script2 ...
 
diff --git a/decompiler/astdump.py b/decompiler/astdump.py
index 95bdab5e..8b108f90 100644
--- a/decompiler/astdump.py
+++ b/decompiler/astdump.py
@@ -26,10 +26,10 @@
 import ast as py_ast
 import renpy
 
-def pprint(out_file, ast, decompile_python=False, comparable=False, line_numbers=False):
+def pprint(out_file, ast, decompile_python=False, comparable=False, line_numbers=False, no_pyexpr=False):
     # The main function of this module, a wrapper which sets
     # the config and creates the AstDumper instance
-    AstDumper(out_file, decompile_python=decompile_python, comparable=comparable, print_line_numbers=line_numbers).dump(ast)
+    AstDumper(out_file, decompile_python=decompile_python, comparable=comparable, print_line_numbers=line_numbers, no_pyexpr=no_pyexpr).dump(ast)
 
 class AstDumper(object):
     """
@@ -40,13 +40,14 @@ class AstDumper(object):
     MAP_OPEN = {list: '[', tuple: '(', set: '{', frozenset: 'frozenset({'}
     MAP_CLOSE = {list: ']', tuple: ')', set: '}', frozenset: '})'}
 
-    def __init__(self, out_file=None, decompile_python=False,
+    def __init__(self, out_file=None, decompile_python=False, no_pyexpr=False,
                  comparable=False, print_line_numbers=False, indentation=u'    '):
         self.indentation = indentation
         self.out_file = out_file or sys.stdout
         self.decompile_python = decompile_python
         self.comparable = comparable
         self.print_line_numbers = print_line_numbers
+        self.no_pyexpr = no_pyexpr
 
     def dump(self, ast):
         self.indent = 0
@@ -141,6 +142,16 @@ def should_print_key(self, ast, key):
             # When hide isn't set, some versions of Ren'Py set it to False and
             # some don't set it at all.
             return False
+        elif (key == 'attributes' and ast.attributes is None and
+            isinstance(ast, renpy.ast.Say)):
+            # When no attributes are set, some versions of Ren'Py set it to None
+            # and some don't set it at all.
+            return False
+        elif (key == 'block' and ast.block == [] and
+            isinstance(ast, renpy.ast.UserStatement)):
+            # When there's no block, some versions of Ren'Py set it to None
+            # and some don't set it at all.
+            return False
         elif (key == 'store' and ast.store == 'store' and
             isinstance(ast, renpy.ast.Python)):
             # When a store isn't specified, some versions of Ren'Py set it to
@@ -187,7 +198,7 @@ def print_object(self, ast):
         self.p('>')
 
     def print_pyexpr(self, ast):
-        if not self.comparable or self.print_line_numbers:
+        if not self.no_pyexpr and (not self.comparable or self.print_line_numbers):
             self.print_object(ast)
             self.p(' = ')
         self.print_string(ast)
diff --git a/unrpyc.py b/unrpyc.py
index a5631cee..3f5d8fa5 100755
--- a/unrpyc.py
+++ b/unrpyc.py
@@ -61,7 +61,7 @@ def read_ast_from_file(in_file):
     return stmts
 
 def decompile_rpyc(input_filename, overwrite=False, dump=False, decompile_python=False,
-                   comparable=False, line_numbers=False):
+                   comparable=False, line_numbers=False, no_pyexpr=False):
     # Output filename is input filename but with .rpy extension
     filepath, ext = path.splitext(input_filename)
     out_filename = filepath + ('.txt' if dump else '.rpy')
@@ -82,7 +82,7 @@ def decompile_rpyc(input_filename, overwrite=False, dump=False, decompile_python
     with codecs.open(out_filename, 'w', encoding='utf-8') as out_file:
         if dump:
             astdump.pprint(out_file, ast, decompile_python=decompile_python, comparable=comparable,
-                                          line_numbers=line_numbers)
+                                          line_numbers=line_numbers, no_pyexpr=no_pyexpr)
         else:
             decompiler.pprint(out_file, ast, decompile_python=decompile_python, line_numbers=line_numbers, printlock=printlock)
     return True
@@ -90,7 +90,7 @@ def decompile_rpyc(input_filename, overwrite=False, dump=False, decompile_python
 def worker(t):
     (args, filename, filesize) = t
     try:
-        return decompile_rpyc(filename, args.clobber, args.dump, decompile_python=args.decompile_python,
+        return decompile_rpyc(filename, args.clobber, args.dump, decompile_python=args.decompile_python, no_pyexpr=args.no_pyexpr,
                                                                 comparable=args.comparable, line_numbers=args.line_numbers)
     except Exception as e:
         printlock.acquire()
@@ -129,6 +129,11 @@ def main():
                         "When decompiling, this causes extra lines to be printed to make line numbers match. "
                         "When dumping the ast, this causes line numbers to be printed even when using --comparable.")
 
+    parser.add_argument('--no-pyexpr', dest='no_pyexpr', action='store_true',
+                        help="Only for dumping, disable special handling of PyExpr objects, instead printing them as strings. "
+                        "This is useful when comparing dumps from different versions of Ren'Py. "
+                        "It should only be used if necessary, since it will cause loss of information such as line numbers.")
+
     parser.add_argument('file', type=str, nargs='+',
                         help="The filenames to decompile")