diff --git a/modem/api_validations.py b/modem/api_validations.py
index 5e397e53..b07cec3e 100644
--- a/modem/api_validations.py
+++ b/modem/api_validations.py
@@ -2,7 +2,7 @@ import re
 
 def validate_freedata_callsign(callsign):
     #regexp = "^[a-zA-Z]+\d+\w+-\d{1,2}$"
-    regexp = "^[A-Za-z0-9]{1,7}-[0-9]$" # still broken - we need to allow all ssids form 0 - 255
+    regexp = "^[A-Za-z0-9]{1,7}-[0-9]{1,3}$" # still broken - we need to allow all ssids form 0 - 255
     return re.compile(regexp).match(callsign) is not None
 
 def validate_message_attachment(attachment):