diff --git a/src/shared/particle_dynamics/general_dynamics/surface_indication/surface_indication.cpp b/src/shared/particle_dynamics/general_dynamics/surface_indication/surface_indication.cpp
index e6234555cc..d8b9e49dc8 100644
--- a/src/shared/particle_dynamics/general_dynamics/surface_indication/surface_indication.cpp
+++ b/src/shared/particle_dynamics/general_dynamics/surface_indication/surface_indication.cpp
@@ -47,7 +47,7 @@ bool FreeSurfaceIndication<Inner<>>::isVeryNearFreeSurface(size_t index_i)
 FreeSurfaceIndication<Inner<SpatialTemporal>>::
     FreeSurfaceIndication(BaseInnerRelation &inner_relation)
     : FreeSurfaceIndication<Inner<>>(inner_relation),
-      previous_surface_indicator_(*particles_->registerSharedVariable<int>("PreviousSurfaceIndicator"))
+      previous_surface_indicator_(*particles_->registerSharedVariable<int>("PreviousSurfaceIndicator", 1))
 {
     particles_->addVariableToSort<int>("PreviousSurfaceIndicator");
 }
diff --git a/tests/2d_examples/test_2d_FVM_flow_around_cylinder/common_weakly_compressible_FVM_classes.cpp b/tests/2d_examples/test_2d_FVM_flow_around_cylinder/common_weakly_compressible_FVM_classes.cpp
index ec8cfb7bcd..3e56d0f8a4 100644
--- a/tests/2d_examples/test_2d_FVM_flow_around_cylinder/common_weakly_compressible_FVM_classes.cpp
+++ b/tests/2d_examples/test_2d_FVM_flow_around_cylinder/common_weakly_compressible_FVM_classes.cpp
@@ -32,7 +32,7 @@ ViscousForceFromFluidInFVM::ViscousForceFromFluidInFVM(BaseInnerRelation &inner_
       mu_(fluid_.ReferenceViscosity()),
       each_boundary_type_contact_real_index_(each_boundary_type_contact_real_index)
 {
-    force_from_fluid_ = particles_->registerSharedVariable<Vecd>("ViscousForceFromFluid");
+    force_from_fluid_ = particles_->registerSharedVariable<Vecd>("ViscousForceOnSolid");
 }
 //=================================================================================================//
 void ViscousForceFromFluidInFVM::interaction(size_t index_i, Real dt)