diff --git a/nlsr_lsa.hpp b/nlsr_lsa.hpp
index a8d3861..2a7294a 100644
--- a/nlsr_lsa.hpp
+++ b/nlsr_lsa.hpp
@@ -145,7 +145,14 @@
 	
 	double getCorRadius()
 	{
-		return corRad;
+		if ( corRad >= 0 )
+		{	
+			return corRad;
+		}
+		else 
+		{
+			return -1;
+		}
 	}
 	
 	void setCorRadius(double cr)