diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 982cba0bd6b3..c4bc564c389a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-12-02  Georg-Johann Lay  <avr@gjlay.de>
+
+	* gcc.c-torture/execute/vector-subscript-1.c (main): Fix
+	__builtin_memcpy arguments to honor sizeof(a).
+
 2011-12-02  Joseph Myers  <joseph@codesourcery.com>
 
 	* gcc.c-torture/execute/doloop-1.c,
diff --git a/gcc/testsuite/gcc.c-torture/execute/vector-subscript-1.c b/gcc/testsuite/gcc.c-torture/execute/vector-subscript-1.c
index 03647fd5074d..8ad8d454857a 100644
--- a/gcc/testsuite/gcc.c-torture/execute/vector-subscript-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/vector-subscript-1.c
@@ -49,7 +49,7 @@ int main( int argc, char* argv[] )
   if (*f(&val3, 3 ) != 4)
     __builtin_abort ();
     
-  __builtin_memcpy(a, &val3, 16);
+  __builtin_memcpy (a, &val3, sizeof(a));
   for(i = 0; i < 4; i++)
     if (a[i] != i+1)
       __builtin_abort ();