diff --git a/xen/arch/x86/spec_ctrl.c b/xen/arch/x86/spec_ctrl.c
index c3f04a2137..748dac7fce 100644
--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -214,7 +214,7 @@ static __init int parse_pv_l1tf(char *s)
 
     /* Interpret 'pv-l1tf' alone in its positive boolean form. */
     if ( *s == '\0' )
-        opt_xpti = OPT_PV_L1TF_DOM0 | OPT_PV_L1TF_DOMU;
+        opt_pv_l1tf = OPT_PV_L1TF_DOM0 | OPT_PV_L1TF_DOMU;
 
     do {
         ss = strchr(s, ',');