diff --git a/gluon/contrib/gateways/fcgi.py b/gluon/contrib/gateways/fcgi.py
index 239b13cb..69609696 100644
--- a/gluon/contrib/gateways/fcgi.py
+++ b/gluon/contrib/gateways/fcgi.py
@@ -1131,7 +1131,7 @@ class Server(object):
         is passed at initialization time, this must be implemented by
         a subclass.
         """
-        raise NotImplementedError, self.__class__.__name__ + '.handler'
+        raise NotImplementedError(self.__class__.__name__ + '.handler')
 
     def error(self, req):
         """
diff --git a/gluon/contrib/pyrtf/Elements.py b/gluon/contrib/pyrtf/Elements.py
index 9df7d1e5..40732cb1 100644
--- a/gluon/contrib/pyrtf/Elements.py
+++ b/gluon/contrib/pyrtf/Elements.py
@@ -415,7 +415,7 @@ class Image( RawCode ) :
             fin = infile
             if 'datatype' not in kwargs.keys():
                 msg = "If passing in a file object, you must also specify type='xxx' where xxx is one of %s" % self.PICT_TYPES.keys()
-                raise ValueError,msg
+                raise ValueError(msg)
             file_name = kwargs.pop('datatype')
         else:
             fin = file( infile, 'rb' )
diff --git a/gluon/contrib/spreadsheet.py b/gluon/contrib/spreadsheet.py
index a85792e8..5317ef34 100644
--- a/gluon/contrib/spreadsheet.py
+++ b/gluon/contrib/spreadsheet.py
@@ -529,7 +529,7 @@ class Sheet:
         """
 
         if not self.regex.match(key):
-            raise SyntaxError, "Invalid cell name: %s" % key
+            raise SyntaxError("Invalid cell name: %s" % key)
         else:
             attributes = self.get_attributes(kwarg)
             if attributes is not None:
diff --git a/gluon/custom_import.py b/gluon/custom_import.py
index 6d156dd6..93e46dd3 100644
--- a/gluon/custom_import.py
+++ b/gluon/custom_import.py
@@ -86,7 +86,7 @@ def custom_importer(name, globals=None, locals=None, fromlist=None, level=-1):
                         try:
                             result = result or sys.modules[modules_prefix+'.'+itemname]
                         except KeyError as e:
-                            raise ImportError, 'Cannot import module %s' % str(e)
+                            raise ImportError('Cannot import module %s' % str(e))
                         modules_prefix += "." + itemname
                     return result
                 else: