diff --git a/ChangeLog b/ChangeLog
index 894a97b38a..156c3adf21 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,11 @@
-Sat Aug 15 00:22:00 2010  Kenta Murata  <mrkn@mrkn.jp>
+Sun Aug 15 13:30:35 2010  Kenta Murata  <mrkn@mrkn.jp>
+
+	* ext/bigdecimal/bigdecimal.h (VpVtoD): fix a type of e.
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_dump, BigDecimal_inspect):
+	  fix format for size_t.
+
+Sun Aug 15 00:22:00 2010  Kenta Murata  <mrkn@mrkn.jp>
 
 	* ext/bigdecimal/extconf.rb, ext/bigdecimal/bigdecimal.h
 	  (labs, llabs): support environments missing labs and llabs.
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 3aa44140e9..1985a26acc 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -239,7 +239,7 @@ BigDecimal_dump(int argc, VALUE *argv, VALUE self)
     GUARD_OBJ(vp,GetVpValue(self,1));
     dump = rb_str_new(0,VpNumOfChars(vp,"E")+50);
     psz = RSTRING_PTR(dump);
-    sprintf(psz,"%lu:",VpMaxPrec(vp)*VpBaseFig());
+    sprintf(psz,"%zu:",VpMaxPrec(vp)*VpBaseFig());
     VpToString(vp, psz+strlen(psz), 0, 0);
     rb_str_resize(dump, strlen(psz));
     return dump;
@@ -1639,7 +1639,7 @@ BigDecimal_inspect(VALUE self)
     tmp = psz + strlen(psz);
     VpToString(vp, tmp, 10, 0);
     tmp += strlen(tmp);
-    sprintf(tmp,"',%lu(%lu)>",VpPrec(vp)*VpBaseFig(),VpMaxPrec(vp)*VpBaseFig());
+    sprintf(tmp, "',%zu(%zu)>", VpPrec(vp)*VpBaseFig(), VpMaxPrec(vp)*VpBaseFig());
     rb_str_resize(obj, strlen(psz));
     return obj;
 }
diff --git a/ext/bigdecimal/bigdecimal.h b/ext/bigdecimal/bigdecimal.h
index e5a8c36e29..d77371fe38 100644
--- a/ext/bigdecimal/bigdecimal.h
+++ b/ext/bigdecimal/bigdecimal.h
@@ -200,7 +200,7 @@ VP_EXPORT int VpToSpecialString(Real *a,char *psz,int fPlus);
 VP_EXPORT void VpToString(Real *a, char *psz, size_t fFmt, int fPlus);
 VP_EXPORT void VpToFString(Real *a, char *psz, size_t fFmt, int fPlus);
 VP_EXPORT int VpCtoV(Real *a, const char *int_chr, size_t ni, const char *frac, size_t nf, const char *exp_chr, size_t ne);
-VP_EXPORT int VpVtoD(double *d, ssize_t *e, Real *m);
+VP_EXPORT int VpVtoD(double *d, SIGNED_VALUE *e, Real *m);
 VP_EXPORT void VpDtoV(Real *m,double d);
 #if 0  /* unused */
 VP_EXPORT void VpItoV(Real *m,S_INT ival);