diff --git a/Source/driver/Castro_F.H b/Source/driver/Castro_F.H
index b495c658ac..bda6248461 100644
--- a/Source/driver/Castro_F.H
+++ b/Source/driver/Castro_F.H
@@ -18,8 +18,6 @@ extern "C"
 
   void ca_extern_init(const int* name, const int* namlen);
 
-  void ca_get_aux_names(int* aux_names,  const int* iaux, const int* len);
-
 #ifdef REACTIONS
   void ca_get_abort_on_failure(int * abort_on_failure);
 
diff --git a/Source/driver/Castro_nd.F90 b/Source/driver/Castro_nd.F90
index 1a7679d4b6..17ba3a8171 100644
--- a/Source/driver/Castro_nd.F90
+++ b/Source/driver/Castro_nd.F90
@@ -72,35 +72,6 @@ end subroutine ca_extern_init
 ! :::
 
 
-subroutine ca_get_aux_names(aux_names,iaux,len) &
-     bind(C, name="ca_get_aux_names")
-     !
-     ! Binds to C function `ca_get_aux_names`
-
-  use network, only: naux, short_aux_names
-  use amrex_fort_module, only: rt => amrex_real
-
-  implicit none
-
-  integer, intent(in   ) :: iaux
-  integer, intent(inout) :: len
-  integer, intent(inout) :: aux_names(len)
-
-  ! Local variables
-  integer   :: i
-
-  len = len_trim(short_aux_names(iaux+1))
-
-  do i = 1,len
-     aux_names(i) = ichar(short_aux_names(iaux+1)(i:i))
-  end do
-
-end subroutine ca_get_aux_names
-
-! :::
-! ::: ----------------------------------------------------------------
-! :::
-
 
 #ifdef REACTIONS
 subroutine ca_get_abort_on_failure(abort_on_failure_in) bind(C, name="ca_get_abort_on_failure")
diff --git a/Source/driver/Castro_setup.cpp b/Source/driver/Castro_setup.cpp
index dcd7420033..43e6b3378e 100644
--- a/Source/driver/Castro_setup.cpp
+++ b/Source/driver/Castro_setup.cpp
@@ -464,15 +464,7 @@ Castro::variableSetUp ()
   // Get the auxiliary names from the network model.
   std::vector<std::string> aux_names;
   for (int i = 0; i < NumAux; i++) {
-    const int len = 20;
-    Vector<int> int_aux_names(len);
-    // This call return the actual length of each string in "len"
-    ca_get_aux_names(int_aux_names.dataPtr(),&i,&len);
-    char char_aux_names[len+1];
-    for (int j = 0; j < len; j++)
-      char_aux_names[j] = int_aux_names[j];
-    char_aux_names[len] = '\0';
-    aux_names.push_back(std::string(char_aux_names));
+    aux_names.push_back(short_aux_names_cxx[i]);
   }
 
   if ( ParallelDescriptor::IOProcessor())