diff --git a/src/fix_deposit.cpp b/src/fix_deposit.cpp
index b1031a52c8..55c8ec4842 100644
--- a/src/fix_deposit.cpp
+++ b/src/fix_deposit.cpp
@@ -65,7 +65,7 @@ FixDeposit::FixDeposit(LAMMPS *lmp, int narg, char **arg) :
 
   options(narg-7,&arg[7]);
 
-  // error check on region and its extent being inside simulation box
+  // error checks on region and its extent being inside simulation box
 
   if (iregion == -1) error->all("Must specify a region in fix deposit");
   if (domain->regions[iregion]->bboxflag == 0)
diff --git a/src/fix_move.cpp b/src/fix_move.cpp
index 32680e9c33..38a4bd4be4 100644
--- a/src/fix_move.cpp
+++ b/src/fix_move.cpp
@@ -491,12 +491,12 @@ void FixMove::initial_integrate(int vflag)
       }
     }
 
-  // for rotate:
-  // P = vector = point of rotation
+  // for rotate by right-hand rule around omega:
+  // P = point = vector = point of rotation
   // R = vector = axis of rotation
   // w = omega of rotation (from period)
-  // X0 = initial coord of atom
-  // R0 = unit vector for R
+  // X0 = xoriginal = initial coord of atom
+  // R0 = runit = unit vector for R
   // C = (X0 dot R0) R0 = projection of atom coord onto R
   // D = X0 - P = vector from P to X0
   // A = D - C = vector from R line to X0