diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index e90540a46a0b..0b755cd7686d 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1059,6 +1059,7 @@ asmlinkage void __init xen_start_kernel(void)
 	/* set up basic CPUID stuff */
 	cpu_detect(&new_cpu_data);
 	new_cpu_data.hard_math = 1;
+	new_cpu_data.wp_works_ok = 1;
 	new_cpu_data.x86_capability[0] = cpuid_edx(1);
 #endif