diff --git a/drivers/target/target_core_ua.h b/drivers/target/target_core_ua.h
index be912b36daae63cc4ca46ab51a75383be8b8cb39..a6b56b364e7af5b7895df6f8b955c3d3d053f296 100644
--- a/drivers/target/target_core_ua.h
+++ b/drivers/target/target_core_ua.h
@@ -1,4 +1,5 @@
 #ifndef TARGET_CORE_UA_H
+#define TARGET_CORE_UA_H
 
 /*
  * From spc4r17, Table D.1: ASC and ASCQ Assignement