diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 30df0bc8a83..2c11f89730f 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,7 @@
+2016-02-10  Yao Qi  <yao.qi@linaro.org>
+
+	* regcache.c (regcache_raw_read_unsigned): Clear *VAL.
+
 2016-02-09  Simon Marchi  <simon.marchi@ericsson.com>
 
 	* configure.ac: Use AC_CONFIG_FILES instead of passing arguments
diff --git a/gdb/gdbserver/regcache.c b/gdb/gdbserver/regcache.c
index 6a737ea37ec..2af8e241d98 100644
--- a/gdb/gdbserver/regcache.c
+++ b/gdb/gdbserver/regcache.c
@@ -440,6 +440,7 @@ regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
             "%d bytes."),
           (int) sizeof (ULONGEST));
 
+  *val = 0;
   collect_register (regcache, regnum, val);
 
   return REG_VALID;