diff --git a/modules/auxiliary/scanner/http/etherpad_duo_login.rb b/modules/auxiliary/scanner/http/etherpad_duo_login.rb
index a4daa7af24..a002bd5415 100644
--- a/modules/auxiliary/scanner/http/etherpad_duo_login.rb
+++ b/modules/auxiliary/scanner/http/etherpad_duo_login.rb
@@ -58,7 +58,7 @@ class MetasploitModule < Msf::Auxiliary
       return false
     end
 
-    if (res and res.code == 200 and res.headers['Server'].include?("EtherPAD") and res.body.include?("EtherPAD Duo"))
+    if (res and res.code == 200 and res.headers['Server'] and res.headers['Server'].include?("EtherPAD") and res.body.include?("EtherPAD Duo"))
       vprint_good("Running EtherPAD Duo application ...")
       return true
     else