diff --git a/smash/web/redcap_connector.py b/smash/web/redcap_connector.py
index ff09df743be6cd71ce5826ed375330df967e4df6..9055a1f2ee06ae0c5452a3378b9ea4bb0e25edea 100644
--- a/smash/web/redcap_connector.py
+++ b/smash/web/redcap_connector.py
@@ -222,7 +222,7 @@ class RedcapConnector(object):
         return result
 
     def create_redcap_link(self, pid, redcap_version, subject):
-        return self.base_url + "/redcap_v" + redcap_version + "/DataEntry/index.php?pid=" + pid + "&id=" + \
+        return self.base_url + "/redcap_v" + redcap_version + "/DataEntry/index.php?pid=" + str(pid) + "&id=" + \
                subject.nd_number + "&page=demographics"
 
     def get_red_cap_subjects(self):