diff --git a/gas/ChangeLog b/gas/ChangeLog
index 7424cf8a420..2893726a026 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -9,6 +9,11 @@
 	* config/tc-arm.c (arm_init_frag): Use frag's thumb_mode information
 	when available.
 
+2015-06-04  Nick Clifton  <nickc@redhat.com>
+
+	* config/tc-h8300.c (md_section_align): Fix compile time warning
+	about left shifting a negative value.
+
 2015-06-03  Matthew Wahab  <matthew.wahab@arm.com>
 
 	* config/tc-arm.c (arm_archs): Add "armv8.1-a".
diff --git a/gas/config/tc-h8300.c b/gas/config/tc-h8300.c
index 2c8a0804d66..9ff813809b7 100644
--- a/gas/config/tc-h8300.c
+++ b/gas/config/tc-h8300.c
@@ -2256,7 +2256,7 @@ valueT
 md_section_align (segT segment, valueT size)
 {
   int align = bfd_get_section_alignment (stdoutput, segment);
-  return ((size + (1 << align) - 1) & (-1 << align));
+  return ((size + (1 << align) - 1) & (-1U << align));
 }
 
 void