diff --git a/tests/lb2_Color_wia_mpi.cpp b/tests/lb2_Color_wia_mpi.cpp
index b6a423fd..a0948144 100644
--- a/tests/lb2_Color_wia_mpi.cpp
+++ b/tests/lb2_Color_wia_mpi.cpp
@@ -427,11 +427,11 @@ int main(int argc, char **argv)
 //	sprintf(LocalRankString,"%05d",rank);
 //	sprintf(LocalRankFilename,"%s%s","ID.",LocalRankString);
 	//.......................................................................
-	for (i=0; i<N; i++)	SignDist.data[i] += (1.0); // map by a pixel to account for interface width
-
 	SignedDistance(SignDist.data,nspheres,cx,cy,cz,rad,Lx,Ly,Lz,Nx,Ny,Nz,
 					   iproc,jproc,kproc,nprocx,nprocy,nprocz);
 	
+	for (i=0; i<N; i++)	SignDist.data[i] += (1.0); // map by a pixel to account for interface width
+
 	//.......................................................................
 	// Assign the phase ID field based on the signed distance
 	//.......................................................................