diff --git a/lib/gpu/lal_base_amoeba.cpp b/lib/gpu/lal_base_amoeba.cpp
index 6f65c8c934..3b67ee31a1 100644
--- a/lib/gpu/lal_base_amoeba.cpp
+++ b/lib/gpu/lal_base_amoeba.cpp
@@ -518,7 +518,8 @@ void BaseAmoebaT::compute_umutual2b(int *host_amtype, int *host_amgroup, double
                                      void** fieldp_ptr) {
   // all the necessary data arrays are already copied from host to device
 
-  cast_extra_data(host_amtype, host_amgroup, host_rpole, host_uind, host_uinp, host_pval);
+  //cast_extra_data(host_amtype, host_amgroup, host_rpole, host_uind, host_uinp, host_pval);
+  cast_extra_data(host_amtype, host_amgroup, nullptr, host_uind, host_uinp, nullptr);
   atom->add_extra_data();                          
 
   _off2_polar = off2_polar;
diff --git a/src/AMOEBA/amoeba_convolution.h b/src/AMOEBA/amoeba_convolution.h
index 270a501a71..00f2b8ed91 100644
--- a/src/AMOEBA/amoeba_convolution.h
+++ b/src/AMOEBA/amoeba_convolution.h
@@ -47,7 +47,7 @@ class AmoebaConvolution : protected Pointers {
   FFT_SCALAR *pre_convolution();
   void *post_convolution();
 
- private:
+ protected:
   int which;                   // caller name for convolution being performed
   int flag3d;                  // 1 if using 3d grid_brick, 0 for 4d cgrid_brick
   int nbrick_owned;            // owned grid points in brick decomp
@@ -71,9 +71,9 @@ class AmoebaConvolution : protected Pointers {
   void *zero_3d();
   void *zero_4d();
   FFT_SCALAR *pre_convolution_3d();
-  FFT_SCALAR *pre_convolution_4d();
+  virtual FFT_SCALAR *pre_convolution_4d();
   void *post_convolution_3d();
-  void *post_convolution_4d();
+  virtual void *post_convolution_4d();
   void kspacebbox(double, double *);
   void procs2grid2d(int, int, int, int &, int &);
 
diff --git a/src/AMOEBA/pair_amoeba.h b/src/AMOEBA/pair_amoeba.h
index 8195b1d16f..93978ab1f2 100644
--- a/src/AMOEBA/pair_amoeba.h
+++ b/src/AMOEBA/pair_amoeba.h
@@ -381,7 +381,7 @@ class PairAmoeba : public Pair {
   void ufield0c(double **, double **);
   void uscale0b(int, double **, double **, double **, double **);
   void dfield0c(double **, double **);
-  void umutual1(double **, double **);
+  virtual void umutual1(double **, double **);
   virtual void umutual2b(double **, double **);
   void udirect1(double **);
   virtual void udirect2b(double **, double **);