diff --git a/modules/0x01-OSINT+Footprinting/0x01-PassiveReconnaissance/subnet.py b/modules/0x01-OSINT+Footprinting/0x01-PassiveReconnaissance/subnet.py
index 2729ab12..9a3e94c9 100644
--- a/modules/0x01-OSINT+Footprinting/0x01-PassiveReconnaissance/subnet.py
+++ b/modules/0x01-OSINT+Footprinting/0x01-PassiveReconnaissance/subnet.py
@@ -30,7 +30,7 @@ def subnet(web):
         text = requests.get('http://api.hackertarget.com/subnetcalc/?q=' + dom).text
         http = str(text)
 
-        if 'error' not in http:
+        if 'null' not in http:
             result = http.splitlines()
             for r in result:
                 print(G+' '+r.split('=')[0]+'='+O+r.split('=')[1])