diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 94c39aaf695facf3d3937633306bb7e5b17d41fd..b6af3ea43c7308b3e513272ccb5c9c0f6c224717 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1131,7 +1131,7 @@ asmlinkage void __init xen_start_kernel(void)
 	if (!xen_start_info)
 		return;
 
-	BUG_ON(memcmp(xen_start_info->magic, "xen-3.0", 7) != 0);
+	BUG_ON(memcmp(xen_start_info->magic, "xen-3", 5) != 0);
 
 	/* Install Xen paravirt ops */
 	pv_info = xen_info;