diff --git a/ChangeLog b/ChangeLog
index 28c5c886..f5b990ce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-10-27  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Removed unused variable r.
+	* src/StringFormat.cc
+
 2010-10-27  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Added printf format check attribute.
diff --git a/src/StringFormat.cc b/src/StringFormat.cc
index 88724636..a39eb929 100644
--- a/src/StringFormat.cc
+++ b/src/StringFormat.cc
@@ -46,8 +46,7 @@ StringFormat::StringFormat(const char* fmt, ...)
   va_list ap;
   va_start(ap, fmt);
   char buf[1024];
-  int r;
-  if((r = vsnprintf(buf, sizeof(buf), fmt, ap)) > 0) {
+  if(vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
     msg_ = buf;
   }
   va_end(ap);