diff --git a/Source/Utils/ParticleUtils.H b/Source/Utils/ParticleUtils.H
index 7e3c89228ea..55cd53f8728 100644
--- a/Source/Utils/ParticleUtils.H
+++ b/Source/Utils/ParticleUtils.H
@@ -30,7 +30,7 @@ namespace ParticleUtils {
      */
     amrex::DenseBins<typename WarpXParticleContainer::ParticleTileType::ParticleTileDataType>
     findParticlesInEachCell (int lev,
-                             amrex::MFIter const & mfi,
+                             const amrex::MFIter & mfi,
                              WarpXParticleContainer::ParticleTileType & ptile);
 
     /**
diff --git a/Source/Utils/ParticleUtils.cpp b/Source/Utils/ParticleUtils.cpp
index cba7c24afab..1cf2f4c98a1 100644
--- a/Source/Utils/ParticleUtils.cpp
+++ b/Source/Utils/ParticleUtils.cpp
@@ -36,10 +36,10 @@ namespace ParticleUtils
 
     /* Find the particles and count the particles that are in each cell.
        Note that this does *not* rearrange particle arrays */
-    amrex::DenseBins<typename WarpXParticleContainer::ParticleTileType::ParticleTileDataType>
+    amrex::DenseBins<ParticleTileDataType>
     findParticlesInEachCell (int lev,
-                             amrex::MFIter const & mfi,
-                             WarpXParticleContainer::ParticleTileType & ptile) {
+                             const amrex::MFIter & mfi,
+                             ParticleTileType & ptile) {
 
         // Extract particle structures for this tile
         int const np = ptile.numParticles();