diff --git a/src/prob/prob_init_fluid_usr.cpp b/src/prob/prob_init_fluid_usr.cpp
index 6ca4b9eb..ac05efe7 100644
--- a/src/prob/prob_init_fluid_usr.cpp
+++ b/src/prob/prob_init_fluid_usr.cpp
@@ -10,6 +10,8 @@ void incflo::column_collapse_granular (Box const& vbx, Box const& nbx,
                                  GpuArray<Real, AMREX_SPACEDIM> const& problo,
                                  GpuArray<Real, AMREX_SPACEDIM> const& probhi)
 {
+    amrex::ignore_unused<Box>(nbx);
+    amrex::ignore_unused<Array4<Real>>(pressure);
     // Ensure it is set to two_fluid
     if (!m_two_fluid) amrex::Abort("probtype 531 involves two fluids");
 
@@ -105,6 +107,8 @@ void incflo::smooth_column_collapse_granular (Box const& vbx, Box const& nbx,
                                  GpuArray<Real, AMREX_SPACEDIM> const& probhi,
                                  Real smoothing_factor)
 {
+    amrex::ignore_unused<Box>(nbx);
+    amrex::ignore_unused<Array4<Real>>(pressure);
     // Ensure it is set to two_fluid
     if (!m_two_fluid) amrex::Abort("probtype 532 involves two fluids");