diff --git a/interfaces/ArrayUtilities.H b/interfaces/ArrayUtilities.H
index 9b000eb77..94f0f5a1e 100644
--- a/interfaces/ArrayUtilities.H
+++ b/interfaces/ArrayUtilities.H
@@ -37,9 +37,10 @@ namespace ArrayUtil
     template <typename T, int XLO, int XHI, int YLO, int YHI>
     struct MathArray2D
     {
-        AMREX_GPU_HOST_DEVICE AMREX_INLINE
+        AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
         void zero()
         {
+            AMREX_UNROLL_LOOP(NET_LOOP_UNROLL_LEN)
             for (int i = 0; i < (YHI-YLO+1)*(XHI-XLO+1); ++i) {
                 arr[i] = 0.0_rt;
             }