diff --git a/Lib/hotshot/log.py b/Lib/hotshot/log.py
index 880b25c..b211825 100644
--- a/Lib/hotshot/log.py
+++ b/Lib/hotshot/log.py
@@ -70,7 +70,7 @@
         try:
             return self._filemap[fileno]
         except KeyError:
-            raise ValueError, "unknown fileno"
+            raise ValueError("unknown fileno")
 
     def get_filenames(self):
         return self._filemap.values()
@@ -80,13 +80,13 @@
         for fileno, name in self._filemap.items():
             if name == filename:
                 return fileno
-        raise ValueError, "unknown filename"
+        raise ValueError("unknown filename")
 
     def get_funcname(self, fileno, lineno):
         try:
             return self._funcmap[(fileno, lineno)]
         except KeyError:
-            raise ValueError, "unknown function location"
+            raise ValueError("unknown function location")
 
     # Iteration support:
     # This adds an optional (& ignored) parameter to next() so that the
@@ -127,7 +127,7 @@
                     self.cwd = lineno
                 self.addinfo(tdelta, lineno)
             else:
-                raise ValueError, "unknown event type"
+                raise ValueError("unknown event type")
 
     def __iter__(self):
         return self
diff --git a/Lib/hotshot/stats.py b/Lib/hotshot/stats.py
index 7ff2277..e927bd5 100644
--- a/Lib/hotshot/stats.py
+++ b/Lib/hotshot/stats.py
@@ -90,4 +90,4 @@
 
 
 def _brokentimer():
-    raise RuntimeError, "this timer should not be called"
+    raise RuntimeError("this timer should not be called")