diff --git a/etc/dict.lua b/etc/dict.lua
index cedbcde..6c40a32 100644
--- a/etc/dict.lua
+++ b/etc/dict.lua
@@ -151,4 +151,4 @@ get = socket.protect(function(gett)
     else return tget(gett) end
 end)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/etc/lp.lua b/etc/lp.lua
index 801e5ed..cc358d1 100644
--- a/etc/lp.lua
+++ b/etc/lp.lua
@@ -318,4 +318,4 @@ query = socket.protect(function(p)
   return data
 end)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/etc/tftp.lua b/etc/tftp.lua
index a8158e2..91b26c9 100644
--- a/etc/tftp.lua
+++ b/etc/tftp.lua
@@ -153,4 +153,4 @@ get = socket.protect(function(gett)
     else return tget(gett) end
 end)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/ftp.lua b/src/ftp.lua
index c3292c2..c55ec4e 100644
--- a/src/ftp.lua
+++ b/src/ftp.lua
@@ -278,4 +278,4 @@ get = socket.protect(function(gett)
     else return tget(gett) end
 end)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/http.lua b/src/http.lua
index cdaac33..27ce960 100644
--- a/src/http.lua
+++ b/src/http.lua
@@ -259,4 +259,4 @@ request = socket.protect(function(reqt, body)
     else return trequest(reqt) end
 end)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/ltn12.lua b/src/ltn12.lua
index b876ecc..813e7d6 100644
--- a/src/ltn12.lua
+++ b/src/ltn12.lua
@@ -276,4 +276,4 @@ function pump.all(src, snk, step)
     end
 end
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/mime.lua b/src/mime.lua
index 62c23bb..71efdb3 100644
--- a/src/mime.lua
+++ b/src/mime.lua
@@ -85,4 +85,4 @@ function mime.stuff()
     return ltn12.filter.cycle(dot, 2)
 end
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/smtp.lua b/src/smtp.lua
index c3924a1..6281544 100644
--- a/src/smtp.lua
+++ b/src/smtp.lua
@@ -245,4 +245,4 @@ send = socket.protect(function(mailt)
     return s:close()
 end)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/socket.lua b/src/socket.lua
index 53cae60..57619fa 100644
--- a/src/socket.lua
+++ b/src/socket.lua
@@ -172,4 +172,4 @@ socket.sourcet["default"] = socket.sourcet["until-closed"]
 
 socket.source = socket.choose(socket.sourcet)
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil
diff --git a/src/tp.lua b/src/tp.lua
index e70831a..085cc2b 100644
--- a/src/tp.lua
+++ b/src/tp.lua
@@ -120,4 +120,4 @@ function connect(host, port, timeout)
     return base.setmetatable({c = c}, metat)
 end
 
-base.getmetatable(_M).__index
+getmetatable(_M).__index = nil
diff --git a/src/url.lua b/src/url.lua
index 7f2c756..e6132f8 100644
--- a/src/url.lua
+++ b/src/url.lua
@@ -273,4 +273,4 @@ function build_path(parsed, unsafe)
 	return path
 end
 
-base.getmetatable(_M).__index = nil
+getmetatable(_M).__index = nil