diff --git a/testApp/chemFoam.C b/testApp/chemFoam.C
index 3d0675a..d54059f 100644
--- a/testApp/chemFoam.C
+++ b/testApp/chemFoam.C
@@ -247,9 +247,9 @@ int main(int argc, char *argv[])
 
         forAll(thermo.composition().species(), k)
         {
-            XY = 0.0;
-            XY[k] = 1.0;
-            gas_.setState_TPY(thermo.T()[0], p[0], XY.data());
+            scalarField YY(0.0);
+            YY[k] = 1.0;
+            gas_.setState_TPY(thermo.T()[0], p[0], YY.data());
 
             logWriter
                 (