diff --git a/ext/.document b/ext/.document
index 797d8dcef8..bf2855bb74 100644
--- a/ext/.document
+++ b/ext/.document
@@ -3,3 +3,4 @@
 iconv/iconv.c
 strscan/strscan.c
 zlib/zlib.c
+win32ole
diff --git a/ext/win32ole/.cvsignore b/ext/win32ole/.cvsignore
index 44e7f262dc..4f6430def0 100644
--- a/ext/win32ole/.cvsignore
+++ b/ext/win32ole/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 mkmf.log
 *.log
+.document
diff --git a/ext/win32ole/.document b/ext/win32ole/.document
deleted file mode 100644
index 19a3a251ff..0000000000
--- a/ext/win32ole/.document
+++ /dev/null
@@ -1 +0,0 @@
-win32ole.c
diff --git a/ext/win32ole/MANIFEST b/ext/win32ole/MANIFEST
index 936cbd6cfa..8e9bd46211 100644
--- a/ext/win32ole/MANIFEST
+++ b/ext/win32ole/MANIFEST
@@ -22,4 +22,3 @@ tests/testVARIANT.rb
 tests/testWIN32OLE.rb
 tests/testall.rb
 win32ole.c
-.document
diff --git a/ext/win32ole/extconf.rb b/ext/win32ole/extconf.rb
index c989267733..de306d0578 100644
--- a/ext/win32ole/extconf.rb
+++ b/ext/win32ole/extconf.rb
@@ -6,6 +6,17 @@
 require 'mkmf'
 
 dir_config("win32")
+
+SRCFILES=<<SRC
+win32ole.c
+SRC
+
+def create_docfile(src)
+  open(File.expand_path($srcdir) + "/.document", "w") {|ofs|
+    ofs.print src
+  }
+end
+
 def create_win32ole_makefile
   if have_library("ole32") and
      have_library("oleaut32") and
@@ -15,9 +26,13 @@ def create_win32ole_makefile
      have_library("advapi32") and
      have_header("windows.h")
     create_makefile("win32ole")
+    create_docfile(SRCFILES)
+  else
+    create_docfile("")
   end
 end
 
+
 case RUBY_PLATFORM
 when /mswin32/
   $CFLAGS += ' /W3'