diff --git a/src/modify.cpp b/src/modify.cpp
index 732770f34e..be6624e6c1 100644
--- a/src/modify.cpp
+++ b/src/modify.cpp
@@ -960,12 +960,12 @@ void Modify::add_fix(int narg, char **arg, int trysuffix)
         replace it later with the desired Fix instance
 ------------------------------------------------------------------------- */
 
-void Modify::replace_fix(const char *replaceID, 
+void Modify::replace_fix(const char *replaceID,
                          int narg, char **arg, int trysuffix)
 {
   int ifix = find_fix(replaceID);
   if (ifix < 0) error->all(FLERR,"Modify replace_fix ID could not be found");
- 
+
   // change ID, igroup, style of fix being replaced to match new fix
   // requires some error checking on arguments for new fix