diff --git a/include/rjp.h b/include/rjp.h
index 384fa03..f25fcba 100644
--- a/include/rjp.h
+++ b/include/rjp.h
@@ -16,8 +16,8 @@
 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef RJP_H
-#define RJP_H
+#ifndef RJP_H_INCLUDED
+#define RJP_H_INCLUDED
 
 #ifdef __cplusplus
 extern "C"{