diff --git a/scripts/broadcast-ripng-discover.nse b/scripts/broadcast-ripng-discover.nse
index d641b3569..d149723ac 100644
--- a/scripts/broadcast-ripng-discover.nse
+++ b/scripts/broadcast-ripng-discover.nse
@@ -209,7 +209,7 @@ action = function()
 	
 	local result = {}
 	for ip, resp in pairs(responses) do
-		print(ip, resp)
+		stdnse.print_debug(ip, resp)
 		table.insert(result, { name = ip, parse_response(resp) } )
 	end
 	return stdnse.format_output(true, result)
diff --git a/scripts/citrix-brute-xml.nse b/scripts/citrix-brute-xml.nse
index 524b6e75a..2b9bf9112 100644
--- a/scripts/citrix-brute-xml.nse
+++ b/scripts/citrix-brute-xml.nse
@@ -78,7 +78,7 @@ function verify_password( host, port, username, password, domain )
 			account.valid = false
 			account.message = "Unspecified"
 		else
-			print("UNKNOWN response: " .. response)
+			stdnse.print_debug("UNKNOWN response: " .. response)
 			account.valid = false
 			account.message = "failed"
 		end
diff --git a/scripts/dns-brute.nse b/scripts/dns-brute.nse
index 1a472e827..c622e5fe6 100644
--- a/scripts/dns-brute.nse
+++ b/scripts/dns-brute.nse
@@ -248,7 +248,7 @@ action = function(host)
 				end
 				file:close()
       else
-				print("dns-brute: Hostlist file not found. Will use default list.")
+				stdnse.print_debug("dns-brute: Hostlist file not found. Will use default list.")
 			end
     end
 		if (not hostlist) then hostlist = HOST_LIST end
diff --git a/scripts/mmouse-exec.nse b/scripts/mmouse-exec.nse
index d6927e9f8..4fde1dbaa 100644
--- a/scripts/mmouse-exec.nse
+++ b/scripts/mmouse-exec.nse
@@ -96,7 +96,7 @@ end
 local function processSwitchMode(socket, swmode)
 	local m, o, a1, a2, p = swmode:match("^(.-)\30(.-)\30(.-)\30(.-)\30(.-)\04$")
 	if ( m ~= "SWITCHMODE") then
-		print("lklklk", m, o)
+		stdnse.print_debug("Unknown SWITCHMODE: %s %s", m, o)
 		return false, "Failed to parse SWITCHMODE"
 	end
 	
diff --git a/scripts/samba-vuln-cve-2012-1182.nse b/scripts/samba-vuln-cve-2012-1182.nse
index 841eb1068..3c21d2502 100644
--- a/scripts/samba-vuln-cve-2012-1182.nse
+++ b/scripts/samba-vuln-cve-2012-1182.nse
@@ -3,6 +3,7 @@ local msrpc = require "msrpc"
 local smb = require "smb"
 local string = require "string"
 local vulns = require "vulns"
+local stdnse = require "stdnse"
 
 description = [[
 Checks if target machines are vulnerable to the Samba heap overflow vulnerability CVE-2012-1182. 
@@ -118,7 +119,7 @@ from an anonymous connection.
 		 						
 	local marshaledHandle = string.rep("X",20)
 	status, result = msrpc.samr_getaliasmembership(smbstate,marshaledHandle, data)
-	print(status, result)
+	stdnse.print_debug(2, "msrpc.samr_getaliasmembership: %s, '%s'", status, result)
 	if(status == false and string.find(result,"Failed to receive bytes after 5 attempts") ~= nil) then
 		samba_cve.state = vulns.STATE.VULN -- connection droped, server crashed 
 	end	
diff --git a/scripts/sip-brute.nse b/scripts/sip-brute.nse
index b70937803..caa62d961 100644
--- a/scripts/sip-brute.nse
+++ b/scripts/sip-brute.nse
@@ -81,7 +81,7 @@ local function checkBadUser(host, port)
 	local pass = "badpass-" .. math.random(10000)
 	local helper = sip.Helper:new(host, port, { expires = 0 })
 		
-	print(user, pass)
+	stdnse.print_debug(2, "Checking bad user: %s/%s", user, pass)
 	local status, err = helper:connect()
 	if ( not(status) ) then return false, "ERROR: Failed to connect" end