diff --git a/xen/arch/x86/hvm/vmsi.c b/xen/arch/x86/hvm/vmsi.c
index 32e417bc15..27b1f089e2 100644
--- a/xen/arch/x86/hvm/vmsi.c
+++ b/xen/arch/x86/hvm/vmsi.c
@@ -716,7 +716,7 @@ out:
     return;
 
 found:
-    if ( !atomic_dec_and_test(&entry->refcnt) )
+    if ( atomic_dec_and_test(&entry->refcnt) )
         del_msixtbl_entry(entry);
 
     spin_unlock_irq(&irqd->lock);