diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index a700cdb13f3d2e21a98befa80255c5587c64c3e1..29b21213ea7586129357bd803c7de89096227bf1 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1616,6 +1616,7 @@ static void __exit ucma_cleanup(void)
 	device_remove_file(ucma_misc.this_device, &dev_attr_abi_version);
 	misc_deregister(&ucma_misc);
 	idr_destroy(&ctx_idr);
+	idr_destroy(&multicast_idr);
 }
 
 module_init(ucma_init);