diff --git a/ChangeLog b/ChangeLog
index 2fd02aad26..688eb6b8c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Wed Jul 23 18:04:42 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Wed Jul 23 18:05:59 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/bigdecimal/bigdecimal.{c,h} (VpIsNegDoubleZero, VpItoV): unused.
 
 	* ext/digest/digest.c (rb_digest_instance_inspect): consitifed.
 
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 636c0907d6..e54ea34a20 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -2180,12 +2180,14 @@ VpGetDoubleNegZero(void) /* Returns the value of -0 */
     return nzero;
 }
 
+#if 0
 VP_EXPORT int
 VpIsNegDoubleZero(double v)
 {
     double z = VpGetDoubleNegZero();
     return MemCmp(&v,&z,sizeof(v))==0;
 }
+#endif
 
 VP_EXPORT int
 VpException(unsigned short f, const char *str,int always)
@@ -4154,6 +4156,7 @@ Exit:
     return;
 }
 
+#if 0
 /*
  *  m <- ival
  */
@@ -4214,6 +4217,7 @@ Exit:
 #endif /* _DEBUG */
     return;
 }
+#endif
 
 /*
  * y = SQRT(x),  y*y - x =>0
diff --git a/ext/bigdecimal/bigdecimal.h b/ext/bigdecimal/bigdecimal.h
index 4f77feab00..513fa245b2 100644
--- a/ext/bigdecimal/bigdecimal.h
+++ b/ext/bigdecimal/bigdecimal.h
@@ -127,7 +127,9 @@ VP_EXPORT unsigned long VpGetRoundMode(void);
 VP_EXPORT unsigned long VpSetRoundMode(unsigned long n);
 
 VP_EXPORT int VpException(unsigned short f,const char *str,int always);
+#if 0
 VP_EXPORT int VpIsNegDoubleZero(double v);
+#endif
 VP_EXPORT U_LONG VpNumOfChars(Real *vp,const char *pszFmt);
 VP_EXPORT U_LONG VpInit(U_LONG BaseVal);
 VP_EXPORT void *VpMemAlloc(U_LONG mb);
@@ -146,7 +148,9 @@ VP_EXPORT void VpToFString(Real *a,char *psz,int fFmt,int fPlus);
 VP_EXPORT int VpCtoV(Real *a,const char *int_chr,U_LONG ni,const char *frac,U_LONG nf,const char *exp_chr,U_LONG ne);
 VP_EXPORT int VpVtoD(double *d,S_LONG *e,Real *m);
 VP_EXPORT void VpDtoV(Real *m,double d);
+#if 0
 VP_EXPORT void VpItoV(Real *m,S_INT ival);
+#endif
 VP_EXPORT int VpSqrt(Real *y,Real *x);
 VP_EXPORT int VpActiveRound(Real *y,Real *x,int f,int il);
 VP_EXPORT int VpMidRound(Real *y, int f, int nf);