diff --git a/django/core/handlers/wsgi.py b/django/core/handlers/wsgi.py
index 73ac1ae0c8..71cfecd9a0 100644
--- a/django/core/handlers/wsgi.py
+++ b/django/core/handlers/wsgi.py
@@ -62,7 +62,7 @@ def safe_copyfileobj(fsrc, fdst, length=16*1024, size=0):
     data in the body.
     """
     if not size:
-        return copyfileobj(fsrc, fdst, length)
+        return
     while size > 0:
         buf = fsrc.read(min(length, size))
         if not buf: