diff --git a/common/TwoPhase.cpp b/common/TwoPhase.cpp
index 21efa581..32d15ff6 100644
--- a/common/TwoPhase.cpp
+++ b/common/TwoPhase.cpp
@@ -249,7 +249,7 @@ void TwoPhase::ComputeDelPhi()
 
 void TwoPhase::Initialize()
 {
-	trimdist=1.0;
+	trimdist=-1.0;
 	fluid_isovalue=solid_isovalue=0.0;
 	// Initialize the averaged quantities
 	awn = aws = ans = lwns = 0.0;