diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 4426290..33df66d 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -23,6 +23,7 @@
 #include <linux/crypto.h>
 #include <linux/completion.h>
 #include <linux/module.h>
+#include <linux/idr.h>
 #include <asm/unaligned.h>
 #include <scsi/scsi_device.h>
 #include <scsi/iscsi_proto.h>