diff --git a/xen/arch/x86/cpu/microcode/core.c b/xen/arch/x86/cpu/microcode/core.c
index ac28ef0c8c..51bb625ba8 100644
--- a/xen/arch/x86/cpu/microcode/core.c
+++ b/xen/arch/x86/cpu/microcode/core.c
@@ -501,10 +501,10 @@ static int control_thread_fn(const struct microcode_patch *patch)
         atomic_inc(&cpu_updated);
     atomic_inc(&cpu_out);
 
-    if ( ret == -EIO )
+    if ( ret )
     {
         printk(XENLOG_ERR
-               "Late loading aborted: CPU%u failed to update ucode\n", cpu);
+               "Late loading aborted: CPU%u failed to update ucode: %d\n", cpu, ret);
         goto out;
     }