diff --git a/ext/Setup b/ext/Setup
index 0376e2fc6c..9c3e2f48fe 100644
--- a/ext/Setup
+++ b/ext/Setup
@@ -5,7 +5,6 @@
 #continuation
 #coverage
 #date
-#dbm
 #digest/bubblebabble
 #digest
 #digest/md5
@@ -14,9 +13,7 @@
 #digest/sha2
 #etc
 #fcntl
-#fiber
 #fiddle
-#gdbm
 #io/console
 #io/nonblock
 #io/wait
diff --git a/ext/Setup.atheos b/ext/Setup.atheos
index 3f6263b1e2..6a8b9903af 100644
--- a/ext/Setup.atheos
+++ b/ext/Setup.atheos
@@ -1,23 +1,19 @@
 option nodynamic
 
-#Win32API
 bigdecimal
 cgi/escape
-dbm
 digest
 digest/md5
 digest/rmd160
 digest/sha1
 digest/sha2
-enumerator
 etc
 fcntl
-gdbm
 io/wait
 nkf
 #openssl
 pty
-racc/parse
+racc/cparse
 readline
 ripper
 socket
diff --git a/ext/Setup.nt b/ext/Setup.nt
index dc36aa8688..067f153d36 100644
--- a/ext/Setup.nt
+++ b/ext/Setup.nt
@@ -1,19 +1,15 @@
 #option platform cygwin|mingw|mswin
 #option nodynamic
 
-Win32API
 bigdecimal
 cgi/escape
-#dbm
 digest
 digest/md5
 digest/rmd160
 digest/sha1
 digest/sha2
-enumerator
 etc
 fcntl
-#gdbm
 #io/wait
 nkf
 #openssl