diff --git a/reactos/drivers/wdm/audio/backpln/portcls/irpstream.c b/reactos/drivers/wdm/audio/backpln/portcls/irpstream.c
index 255562ab725..8e930441804 100644
--- a/reactos/drivers/wdm/audio/backpln/portcls/irpstream.c
+++ b/reactos/drivers/wdm/audio/backpln/portcls/irpstream.c
@@ -452,7 +452,6 @@ IIrpQueue_fnReleaseMappingWithTag(
     }
 
     Found = FALSE;
-    MapIndex = 0;
     while (CurEntry != &This->ListHead)
     {
         CurMapping = CONTAINING_RECORD(CurEntry, IRP_MAPPING, Entry);