diff --git a/Lib/modulefinder.py b/Lib/modulefinder.py
index d5328bc..a57911c 100644
--- a/Lib/modulefinder.py
+++ b/Lib/modulefinder.py
@@ -146,7 +146,7 @@
                 self.msgout(4, "determine_parent ->", parent)
                 return parent
             if pname.count(".") < level:
-                raise ImportError, "relative importpath too deep"
+                raise ImportError("relative importpath too deep")
             pname = ".".join(pname.split(".")[:-level])
             parent = self.modules[pname]
             self.msgout(4, "determine_parent ->", parent)
@@ -191,7 +191,7 @@
                 self.msgout(4, "find_head_package ->", (q, tail))
                 return q, tail
         self.msgout(4, "raise ImportError: No module named", qname)
-        raise ImportError, "No module named " + qname
+        raise ImportError("No module named " + qname)
 
     def load_tail(self, q, tail):
         self.msgin(4, "load_tail", q, tail)
@@ -204,7 +204,7 @@
             m = self.import_module(head, mname, m)
             if not m:
                 self.msgout(4, "raise ImportError: No module named", mname)
-                raise ImportError, "No module named " + mname
+                raise ImportError("No module named " + mname)
         self.msgout(4, "load_tail ->", m)
         return m
 
@@ -220,7 +220,7 @@
                 subname = "%s.%s" % (m.__name__, sub)
                 submod = self.import_module(sub, subname, m)
                 if not submod:
-                    raise ImportError, "No module named " + subname
+                    raise ImportError("No module named " + subname)
 
     def find_all_submodules(self, m):
         if not m.__path__:
@@ -291,7 +291,7 @@
         elif type == imp.PY_COMPILED:
             if fp.read(4) != imp.get_magic():
                 self.msgout(2, "raise ImportError: Bad magic number", pathname)
-                raise ImportError, "Bad magic number in %s" % pathname
+                raise ImportError("Bad magic number in %s" % pathname)
             fp.read(4)
             co = marshal.load(fp)
         else:
@@ -470,7 +470,7 @@
             fullname = name
         if fullname in self.excludes:
             self.msgout(3, "find_module -> Excluded", fullname)
-            raise ImportError, name
+            raise ImportError(name)
 
         if path is None:
             if name in sys.builtin_module_names: