diff --git a/ChangeLog b/ChangeLog
index 8f67350d3a..824f388c3b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Feb  9 23:22:52 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/bigdecimal/extconf.rb: simplified the condition.
+
 Sat Feb  9 17:51:24 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/bigdecimal/bigdecimal.c (BigDecimal_to_f): use strtod() for more
diff --git a/ext/bigdecimal/extconf.rb b/ext/bigdecimal/extconf.rb
index 864aaad862..0c8b98e4a3 100644
--- a/ext/bigdecimal/extconf.rb
+++ b/ext/bigdecimal/extconf.rb
@@ -1,9 +1,7 @@
 require 'mkmf'
 
 base_fig = 0
-src = ("(BASE > 0) && "
-       "(BASE * (BASE+1)) > BASE && "
-       "(BASE * (BASE+1)) / BASE == (BASE+1)")
+src = "(BASE * (BASE+1)) / BASE == (BASE+1)"
 while try_static_assert(src, nil, "-DBASE=10#{'0'*base_fig}UL")
   base_fig += 1
 end