diff --git a/gunicorn/glogging.py b/gunicorn/glogging.py
index 3cc635d9..01310d50 100644
--- a/gunicorn/glogging.py
+++ b/gunicorn/glogging.py
@@ -344,6 +344,9 @@ class Logger(object):
         # setup format
         if not cfg.syslog_prefix:
             prefix = cfg.proc_name.replace(":", ".")
+        else:
+            prefix = cfg.syslog_prefix
+
         prefix = "gunicorn.%s" % prefix
         fmt = logging.Formatter(r"%s: %s" % (prefix, fmt))