diff --git a/prism/src/prism/Prism.java b/prism/src/prism/Prism.java
index 6f894860..956dec2d 100644
--- a/prism/src/prism/Prism.java
+++ b/prism/src/prism/Prism.java
@@ -180,6 +180,7 @@ public class Prism implements PrismSettingsListener
 		bsccComp = true;
 		construction = 3;
 		ordering = 1;
+		sumRoundOff = 1e-5;
 	}
 	
 	// set methods