diff --git a/nselib/bitcoin.lua b/nselib/bitcoin.lua
index 5d3cd3dd1..51ef289e7 100644
--- a/nselib/bitcoin.lua
+++ b/nselib/bitcoin.lua
@@ -136,7 +136,7 @@ Request = {
       local header = bin.pack("<IAI", magic, cmd, len)
 
       -- After 2012-02-20, version messages require checksums
-      header = header .. bin.pack("A", checksum:sub(1,4))
+      header = header .. checksum:sub(1,4)
 
       return header .. payload
     end,
diff --git a/nselib/giop.lua b/nselib/giop.lua
index 642cf7a13..33b2fdcf6 100644
--- a/nselib/giop.lua
+++ b/nselib/giop.lua
@@ -295,8 +295,7 @@ Packet.GIOP.get = {
     local pad = 0
 
     for i=1, #self.sc do
-      local tmp = tostring( self.sc[i])
-      data = data .. bin.pack("A", tmp )
+      data = data .. tostring( self.sc[i])
     end
 
     data = data .. bin.pack( ">ICCCCIIIAIA", self.id, self.resp_expected, pad, pad, pad,
@@ -347,8 +346,7 @@ Packet.GIOP._is_a =
     UNKNOWN, #self.key_addr, self.key_addr, #self.op, self.op, UNKNOWN2, #self.sc )
 
     for i=1, #self.sc do
-      local tmp = tostring( self.sc[i])
-      data = data .. bin.pack("A", tmp )
+      data = data .. tostring( self.sc[i])
     end
 
     data = data .. bin.pack(">IA", #TYPE_ID, TYPE_ID)
@@ -403,8 +401,7 @@ Packet.GIOP.list =
       #self.op, self.op, RESERVED, RESERVED, UNKNOWN2, #self.sc )
 
     for i=1, #self.sc do
-      local tmp = tostring( self.sc[i])
-      data = data .. bin.pack("A", tmp )
+      data = data .. tostring( self.sc[i])
     end
 
     data = data .. bin.pack(">II", UNKNOWN3, self.how_many )
diff --git a/nselib/ldap.lua b/nselib/ldap.lua
index cdfa68ed3..f10b78d56 100644
--- a/nselib/ldap.lua
+++ b/nselib/ldap.lua
@@ -203,7 +203,7 @@ function encodeLDAPOp( appno, isConstructed, data )
   local encoded_str = ""
   local asn1_type = asn1.BERtoInt( asn1.BERCLASS.Application, isConstructed, appno )
 
-  encoded_str = encode( { _ldaptype = bin.pack("A", string.format("%X", asn1_type)), data } )
+  encoded_str = encode( { _ldaptype = string.format("%X", asn1_type), data } )
   return encoded_str
 end
 
@@ -512,7 +512,7 @@ function createFilter( filter )
     filter_str = filter_str .. obj .. val
 
   end
-  return encode( { _ldaptype=bin.pack("A", string.format("%X", asn1_type)), filter_str } )
+  return encode( { _ldaptype=string.format("%X", asn1_type), filter_str } )
 end
 
 --- Converts a search result as received from searchRequest to a "result" table
diff --git a/nselib/pppoe.lua b/nselib/pppoe.lua
index 63dffb2e0..2d7d4e58a 100644
--- a/nselib/pppoe.lua
+++ b/nselib/pppoe.lua
@@ -448,7 +448,7 @@ PPPoE = {
         header = PPPoE.Header:new(PPPoE.Code.PADI),
         tags = tags or {
           PPPoE.Tag:new(PPPoE.TagType.SERVICE_NAME),
-          PPPoE.Tag:new(PPPoE.TagType.HOST_UNIQUE,  bin.pack("A", c))
+          PPPoE.Tag:new(PPPoE.TagType.HOST_UNIQUE, c)
         }
       }
       setmetatable(o, self)
@@ -950,7 +950,7 @@ Helper = {
     local auth_proposed = config_req.options:getById(LCP.ConfigOption.AUTH_PROTO)
 
     if ( auth_proposed.raw ~= auth_data ) then
-      local options = { LCP.ConfigOption:new(LCP.ConfigOption.AUTH_PROTO, nil, bin.pack("A", auth_data)) }
+      local options = { LCP.ConfigOption:new(LCP.ConfigOption.AUTH_PROTO, nil, auth_data) }
       local lcp_req = LCP.ConfigNak:new(self.identifier, options)
       local sess_req = PPPoE.SessionData:new(self.session, tostring(lcp_req))
       local status, resp = self.comm:exch(sess_req)
diff --git a/nselib/rpc.lua b/nselib/rpc.lua
index 7ddcfc032..7bead8ec3 100644
--- a/nselib/rpc.lua
+++ b/nselib/rpc.lua
@@ -1945,9 +1945,8 @@ NFS = {
       return false, "FsStat: No filehandle received"
     end
 
-    data = bin.pack("A", file_handle)
     packet = comm:EncodePacket(nil, NFS.Procedure[comm.version].FSSTAT,
-      {type = Portmap.AuthType.UNIX}, data)
+      {type = Portmap.AuthType.UNIX}, file_handle)
 
     if (not(comm:SendPacket(packet))) then
       return false, "FsStat: Failed to send data"
diff --git a/scripts/path-mtu.nse b/scripts/path-mtu.nse
index c679e4992..4614f8d21 100644
--- a/scripts/path-mtu.nse
+++ b/scripts/path-mtu.nse
@@ -154,7 +154,7 @@ end
 -- different hosts
 local check = function(layer3)
   local ip = packet.Packet:new(layer3, layer3:len())
-  return bin.pack('A', ip.ip_bin_dst)
+  return ip.ip_bin_dst
 end
 
 -- Updates a packet's info and calculates checksum
@@ -341,7 +341,7 @@ action = function(host)
         end
       end
 
-      local test = bin.pack('A', pkt.ip_bin_src)
+      local test = pkt.ip_bin_src
       local status, length, _, layer3 = pcap:pcap_receive()
       while status and test ~= check(layer3) do
         status, length, _, layer3 = pcap:pcap_receive()