diff --git a/include/nuttx/compiler.h b/include/nuttx/compiler.h
index 2ee6bcf5799..736c9f5315e 100644
--- a/include/nuttx/compiler.h
+++ b/include/nuttx/compiler.h
@@ -49,7 +49,7 @@
 
 /* Indicate that a local variable is not used */
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 /* Built-in functions */
 
@@ -290,7 +290,7 @@
 
 /* Indicate that a local variable is not used */
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 /* SDCC-specific definitions ************************************************/
 
@@ -381,7 +381,7 @@
 
 /* Indicate that a local variable is not used */
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 /* It is assumed that the system is build using the small
  * data model with storage defaulting to internal RAM.
@@ -434,7 +434,7 @@
 
 /* Indicate that a local variable is not used */
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 /* Zilog-specific definitions ***********************************************/
 
@@ -563,7 +563,7 @@
 
 /* Indicate that a local variable is not used */
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 /* ICCARM-specific definitions **********************************************/
 
@@ -575,7 +575,7 @@
 
 /* Indicate that a local variable is not used */
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 #  define weak_alias(name, aliasname)
 #  define weak_data            __weak
@@ -667,7 +667,7 @@
 #  undef  CONFIG_HAVE_ANONYMOUS_STRUCT
 #  undef  CONFIG_HAVE_ANONYMOUS_UNION
 
-#  define UNUSED(a) ((void)(a))
+#  define UNUSED(a) ((void)(1 || (a)))
 
 #endif