diff --git a/services/spd/trusty/sm_err.h b/services/spd/trusty/sm_err.h
index 4342466..80a8748 100644
--- a/services/spd/trusty/sm_err.h
+++ b/services/spd/trusty/sm_err.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __LIB_SM_SM_ERR_H
-#define __LIB_SM_SM_ERR_H
+#ifndef SM_ERR_H
+#define SM_ERR_H
 
 /* Errors from the secure monitor */
 #define SM_ERR_UNDEFINED_SMC		0xFFFFFFFF /* Unknown SMC (defined by ARM DEN 0028A(0.9.0) */
@@ -19,4 +19,4 @@
 #define SM_ERR_NOT_ALLOWED		-9	/* SMC call not allowed */
 #define SM_ERR_END_OF_INPUT		-10
 
-#endif
+#endif /* SM_ERR_H */