diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_main.py b/tools/profiling/microbenchmarks/bm_diff/bm_main.py
index cc53bdd6f1e..c84dfb3a583 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_main.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_main.py
@@ -109,7 +109,7 @@ def eintr_be_gone(fn):
         while True:
             try:
                 return fn(*args)
-            except IOError, e:
+            except IOError as e:
                 if e.errno != errno.EINTR:
                     raise