diff --git a/Source/Particles/Resampling/VelocityCoincidenceThinning.H b/Source/Particles/Resampling/VelocityCoincidenceThinning.H
index bb325734777..a815092e03e 100644
--- a/Source/Particles/Resampling/VelocityCoincidenceThinning.H
+++ b/Source/Particles/Resampling/VelocityCoincidenceThinning.H
@@ -123,7 +123,7 @@ public:
         void labelOnSphericalVelocityGrid (const amrex::ParticleReal ux[],
                                            const amrex::ParticleReal uy[],
                                            const amrex::ParticleReal uz[],
-                                           const unsigned int indices[],
+                                           const int indices[],
                                            int bin_array[], int index_array[],
                                            const int cell_start, const int cell_stop ) const
         {
@@ -151,7 +151,7 @@ public:
         void labelOnCartesianVelocityGrid (const amrex::ParticleReal ux[],
                                            const amrex::ParticleReal uy[],
                                            const amrex::ParticleReal uz[],
-                                           const unsigned int indices[],
+                                           const int indices[],
                                            int bin_array[], int index_array[],
                                            const int cell_start, const int cell_stop ) const
         {
@@ -168,7 +168,7 @@ public:
 
         AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
         void operator() (const amrex::ParticleReal ux[], const amrex::ParticleReal uy[],
-                         const amrex::ParticleReal uz[], const unsigned int indices[],
+                         const amrex::ParticleReal uz[], const int indices[],
                          int bin_array[], int index_array[],
                          const int cell_start, const int cell_stop) const
         {