diff --git a/ChangeLog b/ChangeLog
index edfebede38..3cd217118c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb  5 14:41:56 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* vsnprintf.c: remove duplicated def of `UNINITIALIZED_VAR()'.
+
 Wed Feb  5 14:40:16 2014  Koichi Sasada  <ko1@atdot.net>
 
 	* ext/objspace/objspace_dump.c (dump_object): use STR_SHARED_P()
diff --git a/vsnprintf.c b/vsnprintf.c
index 5266927d7f..d8e66cdbd0 100644
--- a/vsnprintf.c
+++ b/vsnprintf.c
@@ -127,12 +127,6 @@
 # include <errno.h>
 #endif
 
-#if __GNUC__ >= 3
-#define UNINITIALIZED_VAR(x) x = x
-#else
-#define UNINITIALIZED_VAR(x) x
-#endif
-
 /*
  * NB: to fit things in six character monocase externals, the stdio
  * code uses the prefix `__s' for stdio objects, typically followed