diff --git a/ntoskrnl/io/iomgr/irq.c b/ntoskrnl/io/iomgr/irq.c
index f82d58d44c1..2fed5d1703c 100644
--- a/ntoskrnl/io/iomgr/irq.c
+++ b/ntoskrnl/io/iomgr/irq.c
@@ -112,6 +112,7 @@ IoConnectInterrupt(OUT PKINTERRUPT *InterruptObject,
                 }
 
                 /* And fail */
+                *InterruptObject = NULL;
                 return STATUS_INVALID_PARAMETER;
             }