diff --git a/tools/show-profile-results.py b/tools/show-profile-results.py
index 5adb55c29c..ef773843a8 100755
--- a/tools/show-profile-results.py
+++ b/tools/show-profile-results.py
@@ -12,7 +12,7 @@ can find more advanced tools for showing profiler results.
 
 try:
     fn = sys.argv[1]
-except:
+except IndexError:
     print('''
     Please supply a filename.  (If you use the profiled decorator,
     the file will have a suffix of ".profile".)