diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index efee14db009b9612eaee62443435ba244ea59eb0..5240f563076de2e0e27c92af2d04ad03d213ee8f 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1758,6 +1758,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
 #ifdef CONFIG_X86_32
 	i386_start_kernel();
 #else
+	cr4_init_shadow(); /* 32b kernel does this in i386_start_kernel() */
 	x86_64_start_reservations((char *)__pa_symbol(&boot_params));
 #endif
 }