diff --git a/include/epanet2.h b/include/epanet2.h
index 6c3a7fa..9b013a1 100755
--- a/include/epanet2.h
+++ b/include/epanet2.h
@@ -84,6 +84,7 @@
 #define EN_SETTING      12
 #define EN_ENERGY       13
 #define EN_LINKQUAL     14     /* TNT */
+#define EN_LINKPATTERN  15
 
 #define EN_DURATION     0    /* Time parameters */
 #define EN_HYDSTEP      1
@@ -258,4 +259,4 @@ extern "C" {
 }
 #endif
 
-#endif //TOOLKIT_H
\ No newline at end of file
+#endif //TOOLKIT_H