diff --git a/endpoints/api/discovery.py b/endpoints/api/discovery.py
index c688feb4e..f496ce2ee 100644
--- a/endpoints/api/discovery.py
+++ b/endpoints/api/discovery.py
@@ -17,7 +17,7 @@ from endpoints.api import (ApiResource, resource, method_metadata, nickname, tru
 logger = logging.getLogger(__name__)
 
 
-PARAM_REGEX = re.compile(r'<([\w]+:)?([\w]+)>')
+PARAM_REGEX = re.compile(r'<([^:>]+:)*([\w]+)>')
 
 
 TYPE_CONVERTER = {