diff --git a/designer_base/src/com/fr/design/designer/IntervalConstants.java b/designer_base/src/com/fr/design/designer/IntervalConstants.java
index 803d3015e8..1f210c70f5 100644
--- a/designer_base/src/com/fr/design/designer/IntervalConstants.java
+++ b/designer_base/src/com/fr/design/designer/IntervalConstants.java
@@ -17,6 +17,8 @@ public class IntervalConstants {
 
     public static final int INTERVAL_L6 = 5;
 
+    public static final int INTERVAL_L7 = 8;
+
     public static final int INTERVAL_W0 = 3;
 
     public static final int INTERVAL_W1 = 25;