diff --git a/tools/perf/tests/attr.py b/tools/perf/tests/attr.py
index ff9b60b99f52a9bb834f85fc2e296a4d897bf9ae..44090a9a19f3b9f33b0ae8eee972941a919fca4c 100644
--- a/tools/perf/tests/attr.py
+++ b/tools/perf/tests/attr.py
@@ -116,7 +116,7 @@ class Event(dict):
             if not self.has_key(t) or not other.has_key(t):
                 continue
             if not data_equal(self[t], other[t]):
-		log.warning("expected %s=%s, got %s" % (t, self[t], other[t]))
+                log.warning("expected %s=%s, got %s" % (t, self[t], other[t]))
 
 # Test file description needs to have following sections:
 # [config]