diff --git a/flake8/main.py b/flake8/main.py
index 3b6d30c..03d04b4 100644
--- a/flake8/main.py
+++ b/flake8/main.py
@@ -32,7 +32,8 @@ def main():
     report = flake8_style.check_files()
 
     exit_code = print_report(report, flake8_style)
-    raise SystemExit(exit_code > 0)
+    if exit_code > 0:
+        raise SystemExit(exit_code > 0)
 
 
 def print_report(report, flake8_style):