diff --git a/ext/bigdecimal/.cvsignore b/ext/bigdecimal/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/bigdecimal/.cvsignore
+++ b/ext/bigdecimal/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/curses/.cvsignore b/ext/curses/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/curses/.cvsignore
+++ b/ext/curses/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/digest/.cvsignore b/ext/digest/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/digest/.cvsignore
+++ b/ext/digest/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/digest/md5/.cvsignore b/ext/digest/md5/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/digest/md5/.cvsignore
+++ b/ext/digest/md5/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/digest/rmd160/.cvsignore b/ext/digest/rmd160/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/digest/rmd160/.cvsignore
+++ b/ext/digest/rmd160/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/digest/sha1/.cvsignore b/ext/digest/sha1/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/digest/sha1/.cvsignore
+++ b/ext/digest/sha1/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/digest/sha2/.cvsignore b/ext/digest/sha2/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/digest/sha2/.cvsignore
+++ b/ext/digest/sha2/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/dl/.cvsignore b/ext/dl/.cvsignore
index 489fab1c63..6c0b25a1c5 100644
--- a/ext/dl/.cvsignore
+++ b/ext/dl/.cvsignore
@@ -7,3 +7,4 @@ callback.h
 *.o
 *~
 *.def
+extconf.h
diff --git a/ext/etc/.cvsignore b/ext/etc/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/etc/.cvsignore
+++ b/ext/etc/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/fcntl/.cvsignore b/ext/fcntl/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/fcntl/.cvsignore
+++ b/ext/fcntl/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/iconv/.cvsignore b/ext/iconv/.cvsignore
index 394787fced..66c8f5297a 100644
--- a/ext/iconv/.cvsignore
+++ b/ext/iconv/.cvsignore
@@ -3,3 +3,4 @@ mkmf.log
 *.def
 iconv.rb
 config.charset
+extconf.h
diff --git a/ext/io/wait/.cvsignore b/ext/io/wait/.cvsignore
index fc802ff1c2..8767482975 100644
--- a/ext/io/wait/.cvsignore
+++ b/ext/io/wait/.cvsignore
@@ -1,2 +1,3 @@
 Makefile
 mkmf.log
+extconf.h
diff --git a/ext/nkf/.cvsignore b/ext/nkf/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/nkf/.cvsignore
+++ b/ext/nkf/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/openssl/.cvsignore b/ext/openssl/.cvsignore
index dfb8bfb8bb..3a9a9f341f 100644
--- a/ext/openssl/.cvsignore
+++ b/ext/openssl/.cvsignore
@@ -2,3 +2,4 @@ GNUmakefile
 Makefile
 mkmf.log
 dep
+extconf.h
diff --git a/ext/pty/.cvsignore b/ext/pty/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/pty/.cvsignore
+++ b/ext/pty/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/racc/cparse/.cvsignore b/ext/racc/cparse/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/racc/cparse/.cvsignore
+++ b/ext/racc/cparse/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/readline/.cvsignore b/ext/readline/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/readline/.cvsignore
+++ b/ext/readline/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/ripper/.cvsignore b/ext/ripper/.cvsignore
index 0f4481adca..c9adce0b1a 100644
--- a/ext/ripper/.cvsignore
+++ b/ext/ripper/.cvsignore
@@ -1,6 +1,8 @@
 Makefile
+mkmf.log
 eventids1.c
 eventids2table.c
 ripper.*
 ids1
 ids2
+extconf.h
diff --git a/ext/sdbm/.cvsignore b/ext/sdbm/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/sdbm/.cvsignore
+++ b/ext/sdbm/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/socket/.cvsignore b/ext/socket/.cvsignore
index 6750b63b51..ce98586d91 100644
--- a/ext/socket/.cvsignore
+++ b/ext/socket/.cvsignore
@@ -2,3 +2,4 @@ Makefile
 mkmf.log
 *.def
 constants.h
+extconf.h
diff --git a/ext/stringio/.cvsignore b/ext/stringio/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/stringio/.cvsignore
+++ b/ext/stringio/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/strscan/.cvsignore b/ext/strscan/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/strscan/.cvsignore
+++ b/ext/strscan/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/syck/.cvsignore b/ext/syck/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/syck/.cvsignore
+++ b/ext/syck/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/syslog/.cvsignore b/ext/syslog/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/syslog/.cvsignore
+++ b/ext/syslog/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h
diff --git a/ext/zlib/.cvsignore b/ext/zlib/.cvsignore
index 4088712231..814345ece8 100644
--- a/ext/zlib/.cvsignore
+++ b/ext/zlib/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.def
+extconf.h