diff --git a/tests/lbpm_uCT_pp.cpp b/tests/lbpm_uCT_pp.cpp
index b40dbf8b..a2a7ea53 100644
--- a/tests/lbpm_uCT_pp.cpp
+++ b/tests/lbpm_uCT_pp.cpp
@@ -779,7 +779,7 @@ int main(int argc, char **argv)
 			for (i=0;i<nsx;i++){
 				float dst = spDist(i,j,k);
 				// use exponential weight based on the distance
-				float temp = 1.0-exp(-lambda*fabs(dst)));
+				float temp = 1.0-exp(-lambda*fabs(dst));
 				float value;
 				if (dst > 0){
 					value = temp*mean_plus;