diff --git a/ChangeLog b/ChangeLog
index 62759bb25..faf8d81d5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-12-16  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/tests/sleep_test.c: Silence spurious warning.
+
 2013-12-16  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Make grub_xen_hypercall on i386 cdecl rather than stdcall to avoid
diff --git a/grub-core/tests/sleep_test.c b/grub-core/tests/sleep_test.c
index 98ea57262..3dda30312 100644
--- a/grub-core/tests/sleep_test.c
+++ b/grub-core/tests/sleep_test.c
@@ -32,7 +32,7 @@ static void
 sleep_test (void)
 {
   struct grub_datetime st, en;
-  grub_int32_t stu, enu;
+  grub_int32_t stu = 0, enu = 0;
   grub_test_assert (!grub_get_datetime (&st), "Couldn't retrieve start time");
   grub_millisleep (10000);
   grub_test_assert (!grub_get_datetime (&en), "Couldn't retrieve end time");