diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1c80d9478fd..a626aa4d794 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-10-21  Jeff Law  <law@redhat.com>
+
+	* varasm.c (handle_vtv_comdat_section): Mark 2nd parameter with
+	ATTRIBUTE_UNUSED.
+
 2015-10-21  Richard Biener  <rguenther@suse.de>
 	    Naveen H.S  <Naveen.Hurugalawadi@caviumnetworks.com>
 
diff --git a/gcc/varasm.c b/gcc/varasm.c
index 2b6da59d753..9cb7ac1e763 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -7747,7 +7747,7 @@ default_asm_output_ident_directive (const char *ident_str)
    a single call to "switch_to_section (sect)".  */
 
 static void
-handle_vtv_comdat_section (section *sect, const_tree decl)
+handle_vtv_comdat_section (section *sect, const_tree decl ATTRIBUTE_UNUSED)
 {
 #if defined (OBJECT_FORMAT_ELF)
   targetm.asm_out.named_section (sect->named.name,