diff --git a/flask_apispec/paths.py b/flask_apispec/paths.py
index 063422a..5f0aca9 100644
--- a/flask_apispec/paths.py
+++ b/flask_apispec/paths.py
@@ -37,10 +37,13 @@ def argument_to_param(argument, rule, override=None):
         'required': True,
     }
     type_, format_ = CONVERTER_MAPPING.get(type(rule._converters[argument]), DEFAULT_TYPE)
-    param['type'] = type_
+    param['schema'] = {
+        'type' : type_
+    }
     if format_ is not None:
         param['format'] = format_
     if rule.defaults and argument in rule.defaults:
         param['default'] = rule.defaults[argument]
     param.update(override or {})
     return param
+