diff --git a/ChangeLog b/ChangeLog
index 42d49af148..2b0d051ece 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Jan 25 11:50:20 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (create_makefile):fixed the variables order because
+	  converter proc refers the separator.
+
 Sun Jan 25 11:25:10 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* Makefile.in, win32/Makefile.sub (RMDIRS): remove directory and
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 1d46f6c299..ec264796ae 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1657,12 +1657,12 @@ static: $(STATIC_LIB)#{$extout ? " install-rb" : ""}
   mfile.print CLEANINGS
   fsep = config_string('BUILD_FILE_SEPARATOR') {|s| s unless s == "/"}
   if fsep
+    sep = ":/=#{fsep}"
     fseprepl = proc {|s|
       s = s.gsub("/", fsep)
       s = s.gsub(/(\$\(\w+)(\))/) {$1+sep+$2}
       s = s.gsub(/(\$\{\w+)(\})/) {$1+sep+$2}
     }
-    sep = ":/=#{fsep}"
   else
     fseprepl = proc {|s| s}
     sep = ""