diff --git a/ChangeLog b/ChangeLog
index 8da7e015b3..c36ab072ab 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Mar 12 01:26:24 2011  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* ext/date/date_core.c: changed some directives.
+
 Sat Mar 12 01:16:02 2011  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* ext/date/date_core.c, ext/date/lib/*: moved rdoc descriptions.
diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 9ca55b2802..9aebff1230 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -209,7 +209,7 @@ find_ldoy(int y, double sg, long *rjd, int *ns)
     return 0;
 }
 
-#if 0
+#ifndef NDEBUG
 static int
 find_fdom(int y, int m, double sg, long *rjd, int *ns)
 {
@@ -344,7 +344,7 @@ jd_to_commercial(long jd, double sg, int *ry, int *rw, int *rd)
 	*rd = 7;
 }
 
-#if 0
+#ifndef NDEBUG
 static void
 weeknum_to_jd(int y, int w, int d, int f, double sg, long *rjd, int *ns)
 {
@@ -372,7 +372,7 @@ jd_to_weeknum(long jd, int f, double sg, int *ry, int *rw, int *rd)
     *rd = MOD(j, 7);
 }
 
-#if 0
+#ifndef NDEBUG
 static void
 nth_kday_to_jd(int y, int m, int n, int k, double sg, long *rjd, int *ns)
 {
@@ -392,7 +392,7 @@ nth_kday_to_jd(int y, int m, int n, int k, double sg, long *rjd, int *ns)
 }
 #endif
 
-#if 0
+#ifndef NDEBUG
 inline static int jd_to_wday(long jd);
 
 static void
diff --git a/ext/date/lib/date.rb b/ext/date/lib/date.rb
index e48da79359..ed24532d51 100644
--- a/ext/date/lib/date.rb
+++ b/ext/date/lib/date.rb
@@ -1216,7 +1216,7 @@ class Date
 
   def new_start_r(sg=self.class::ITALY) self.class.new_r!(ajd, offset, sg) end # :nodoc:
 
-  private :start_r, :new_start_r
+  private :new_start_r
 
   # Create a copy of this Date object that uses the Italian/Catholic
   # Day of Calendar Reform.