diff --git a/src/comm.cpp b/src/comm.cpp
index 0e5479cc46..49dfbaec57 100644
--- a/src/comm.cpp
+++ b/src/comm.cpp
@@ -889,8 +889,8 @@ void Comm::exchange()
    borders: list nearby atoms to send to neighboring procs at every timestep
    one list is created for every swap that will be made
    as list is made, actually do swaps
-   this does equivalent of a communicate (so don't need to explicitly
-     call communicate routine on reneighboring timestep)
+   this does equivalent of a communicate, so don't need to explicitly
+     call communicate routine on reneighboring timestep
    this routine is called before every reneighboring
    for triclinic, atoms must be in lamda coords (0-1) before borders is called
 ------------------------------------------------------------------------- */
diff --git a/src/kspace.h b/src/kspace.h
index 1110269a6f..2d9eb016ee 100644
--- a/src/kspace.h
+++ b/src/kspace.h
@@ -69,9 +69,9 @@ class KSpace : protected Pointers {
   virtual void compute(int, int) = 0;
   virtual void compute_group_group(int, int, int) {};
 
-  virtual int pack_forward(int, FFT_SCALAR *, int, int *) {return 0;};
+  virtual void pack_forward(int, FFT_SCALAR *, int, int *) {};
   virtual void unpack_forward(int, FFT_SCALAR *, int, int *) {};
-  virtual int pack_reverse(int, FFT_SCALAR *, int, int *) {return 0;};
+  virtual void pack_reverse(int, FFT_SCALAR *, int, int *) {};
   virtual void unpack_reverse(int, FFT_SCALAR *, int, int *) {};
 
   virtual int timing(int, double &, double &) {return 0;}