diff --git a/Demo/scripts/toaiff.py b/Demo/scripts/toaiff.py
index 438d225..5794859 100644
--- a/Demo/scripts/toaiff.py
+++ b/Demo/scripts/toaiff.py
@@ -80,7 +80,7 @@
         temps.append(fname)
         sts = uncompress.copy(filename, fname)
         if sts:
-            raise error, filename + ': uncompress failed'
+            raise error(filename + ': uncompress failed')
     else:
         fname = filename
     try:
@@ -93,15 +93,15 @@
             msg = msg[1]
         if type(msg) != type(''):
             msg = repr(msg)
-        raise error, filename + ': ' + msg
+        raise error(filename + ': ' + msg)
     if ftype == 'aiff':
         return fname
     if ftype is None or not ftype in table:
-        raise error, '%s: unsupported audio file type %r' % (filename, ftype)
+        raise error('%s: unsupported audio file type %r' % (filename, ftype))
     (fd, temp) = tempfile.mkstemp()
     os.close(fd)
     temps.append(temp)
     sts = table[ftype].copy(fname, temp)
     if sts:
-        raise error, filename + ': conversion to aiff failed'
+        raise error(filename + ': conversion to aiff failed')
     return temp
diff --git a/Lib/UserString.py b/Lib/UserString.py
index c55c1bf..de50396 100755
--- a/Lib/UserString.py
+++ b/Lib/UserString.py
@@ -197,7 +197,7 @@
             elif step != 1:
                 # XXX(twouters): I guess we should be reimplementing
                 # the extended slice assignment/deletion algorithm here...
-                raise TypeError, "invalid step in slicing assignment"
+                raise TypeError("invalid step in slicing assignment")
             start = min(start, stop)
             self.data = self.data[:start] + sub + self.data[stop:]
         else:
@@ -212,7 +212,7 @@
                 start, stop = stop+1, start+1
             elif step != 1:
                 # XXX(twouters): see same block in __setitem__
-                raise TypeError, "invalid step in slicing deletion"
+                raise TypeError("invalid step in slicing deletion")
             start = min(start, stop)
             self.data = self.data[:start] + self.data[stop:]
         else:
diff --git a/Lib/encodings/utf_32.py b/Lib/encodings/utf_32.py
index 4bbd22a..f0b7709 100644
--- a/Lib/encodings/utf_32.py
+++ b/Lib/encodings/utf_32.py
@@ -127,7 +127,7 @@
         elif byteorder == 1:
             self.decode = codecs.utf_32_be_decode
         elif consumed>=4:
-            raise UnicodeError,"UTF-32 stream does not start with BOM"
+            raise UnicodeError("UTF-32 stream does not start with BOM")
         return (object, consumed)
 
 ### encodings module API
diff --git a/Parser/asdl.py b/Parser/asdl.py
index a3701e6..8fbd9ec 100644
--- a/Parser/asdl.py
+++ b/Parser/asdl.py
@@ -103,7 +103,7 @@
 
     def t_default(self, s):
         r" . +"
-        raise ValueError, "unmatched input: %r" % s
+        raise ValueError("unmatched input: %r" % s)
 
 class ASDLParser(spark.GenericParser, object):
     def __init__(self):