diff --git a/src/atom.cpp b/src/atom.cpp
index e819c13877..fe85b66e71 100644
--- a/src/atom.cpp
+++ b/src/atom.cpp
@@ -2060,14 +2060,13 @@ void Atom::add_molecule_atom(Molecule *onemol, int iatom, int ilocal, tagint off
    allocate space for type label map
 ------------------------------------------------------------------------- */
 
-void Atom::add_label_map(const std::string &mapID)
+void Atom::add_label_map()
 {
   labelmapflag = 1;
   lmap = (LabelMap *)
     memory->srealloc(lmap,sizeof(LabelMap *),
                      "atom::lmap");
   lmap = new LabelMap(lmp);
-  if (mapID != "") lmap->id = mapID;
   lmap->natomtypes = ntypes;
   lmap->nbondtypes = nbondtypes;
   lmap->nangletypes = nangletypes;
diff --git a/src/atom.h b/src/atom.h
index 395f4986d5..12be0e8d68 100644
--- a/src/atom.h
+++ b/src/atom.h
@@ -355,7 +355,7 @@ class Atom : protected Pointers {
   int find_molecule(char *);
   void add_molecule_atom(class Molecule *, int, int, tagint);
 
-  void add_label_map(const std::string &mapID = "");
+  void add_label_map();
 
   void first_reorder();
   virtual void sort();
diff --git a/src/input.cpp b/src/input.cpp
index d4a0310211..df633b5ff7 100644
--- a/src/input.cpp
+++ b/src/input.cpp
@@ -1631,20 +1631,6 @@ void Input::labelmap()
     error->all(FLERR,"Labelmap command before simulation box is defined");
 
   if (!atom->labelmapflag) atom->add_label_map();
-
-  std::string mapid;
-  for (int i = 1; i < narg; i++) {
-    if (strcmp(arg[i],"mapID") == 0) {
-      mapid = arg[i+1];
-      if (narg > i+2) error->all(FLERR,"Illegal labelmap command");
-      if (atom->lmap->id == "") atom->lmap->id == mapid;
-      else if (atom->lmap->id != mapid)
-        error->all(FLERR,"Labelmap ID {} does not match existing ID {}",mapid,atom->lmap->id);
-      narg = narg - 2;
-      break;
-    }
-    i++;
-  }
   atom->lmap->modify_lmap(narg,arg);
 }
 
diff --git a/src/label_map.h b/src/label_map.h
index 4e5582c170..524145f06a 100644
--- a/src/label_map.h
+++ b/src/label_map.h
@@ -23,7 +23,6 @@ namespace LAMMPS_NS {
 class LabelMap : protected Pointers {
  public:
    int natomtypes,nbondtypes,nangletypes,ndihedraltypes,nimpropertypes;
-   std::string id;
    std::vector<std::string> typelabel,btypelabel,atypelabel;
    std::vector<std::string> dtypelabel,itypelabel;
    std::unordered_map<std::string, int> typelabel_map;