diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c
index ec6b3e938457cc591c7b3725732362deb0a5f796..43fbd0c778ae3b946ecf46942a7a31d939cde955 100644
--- a/target-i386/op_helper.c
+++ b/target-i386/op_helper.c
@@ -349,6 +349,10 @@ static void switch_tss(int tss_selector,
         new_segs[R_GS] = 0;
         new_trap = 0;
     }
+    /* XXX: avoid a compiler warning, see
+     http://support.amd.com/us/Processor_TechDocs/24593.pdf
+     chapters 12.2.5 and 13.2.4 on how to implement TSS Trap bit */
+    (void)new_trap;
 
     /* NOTE: we must avoid memory exceptions during the task switch,
        so we make dummy accesses before */