diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1714cec1844..c5a4a86d5c6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-09-30  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	* data-streamer.c (bp_unpack_var_len_int): Avoid signed
+	integer overflow.
+
 2014-09-29  Andi Kleen  <ak@linux.intel.com>
 
 	* opts.c (print_filtered_help): Print --param min/max/default
diff --git a/gcc/data-streamer.c b/gcc/data-streamer.c
index 0e19c72162a..785beb5165f 100644
--- a/gcc/data-streamer.c
+++ b/gcc/data-streamer.c
@@ -110,7 +110,7 @@ bp_unpack_var_len_int (struct bitpack_d *bp)
       if ((half_byte & 0x8) == 0)
 	{
 	  if ((shift < HOST_BITS_PER_WIDE_INT) && (half_byte & 0x4))
-	    result |= - ((HOST_WIDE_INT)1 << shift);
+	    result |= - (HOST_WIDE_INT_1U << shift);
 
 	  return result;
 	}