diff --git a/ChangeLog b/ChangeLog
index b724e05c8c..31a008d28f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jan 21 16:44:15 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (merge_libs): squeeze successive same libraries.
+	  [ruby-dev:22652]
+
 Wed Jan 21 16:10:36 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/base64.rb: enclosed in a module.  [ruby-core:02285]
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index fb62c271ea..d3076f40d3 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -117,6 +117,7 @@ def merge_libs(*libs)
   libs.inject([]) do |x, y|
     xy = x & y
     xn = yn = 0
+    y = y.inject([]) {|ary, e| ary.last == e ? ary : ary << e}
     y.each_with_index do |v, yi|
       if xy.include?(v)
         xi = [x.index(v), xn].max()