diff --git a/nselib/stdnse.lua b/nselib/stdnse.lua
index 1677eff31..7ea691b21 100644
--- a/nselib/stdnse.lua
+++ b/nselib/stdnse.lua
@@ -494,7 +494,14 @@ function format_output(status, data, indent)
 		return nil
 	end
 
-	return format_output_sub(status, data, indent)
+	local result = format_output_sub(status, data, indent)
+
+	-- Check for an empty result
+	if(result == nil or #result == "" or result == "\n" or result == " \n") then
+		return nil
+	end
+
+	return result
 end
 
 --- This function allows you to create worker threads that may perform
diff --git a/scripts/smb-check-vulns.nse b/scripts/smb-check-vulns.nse
index ebf1c8ce2..d24c0efa8 100644
--- a/scripts/smb-check-vulns.nse
+++ b/scripts/smb-check-vulns.nse
@@ -418,7 +418,7 @@ local function get_response(check, message, description, minimum_verbosity, mini
 			return string.format("%s: %s (%s)", check, message, description)
 		end
 	else
-		return ''
+		return nil
 	end
 end
 
diff --git a/scripts/smb-enum-sessions.nse b/scripts/smb-enum-sessions.nse
index 1638f9133..79dd7bd7f 100644
--- a/scripts/smb-enum-sessions.nse
+++ b/scripts/smb-enum-sessions.nse
@@ -271,13 +271,13 @@ action = function(host)
 
 	-- Enumerate the logged in users
 	local logged_in = {}
-	logged_in['name'] = "Users logged in"
 	status1, users = winreg_enum_rids(host)
 	if(status1 == false) then
 		logged_in['warning'] = "Couldn't enumerate login sessions: " .. users
 	else
+		logged_in['name'] = "Users logged in"
 		if(#users == 0) then
-			table.insrt(response, "<nobody>")
+			table.insert(response, "<nobody>")
 		else
 			for i = 1, #users, 1 do
 				if(users[i]['name'] ~= nil) then
@@ -290,11 +290,11 @@ action = function(host)
 
 	-- Get the connected sessions
 	local sessions_output = {}
-	sessions_output['name'] = "Active SMB sessions"
 	status2, sessions = srvsvc_enum_sessions(host)
 	if(status2 == false) then
-		sessions_output['warning'] = "Couldn't enumerate network sessions: " .. sessions
+		sessions_output['warning'] = "Couldn't enumerate SMB sessions: " .. sessions
 	else
+		sessions_output['name'] = "Active SMB sessions"
 		if(#sessions == 0) then
 			table.insert(sessions_output, "<none>")
 		else