diff --git a/src/MC/fix_gcmc.cpp b/src/MC/fix_gcmc.cpp
index 9bb5c1f2e8..03953ed10e 100644
--- a/src/MC/fix_gcmc.cpp
+++ b/src/MC/fix_gcmc.cpp
@@ -237,6 +237,17 @@ FixGCMC::~FixGCMC()
   if (regionflag) delete [] idregion;
   delete random_equal;
   delete random_unequal;
+
+  // remove rotation group this fix defined
+
+  if (rotation_group) {
+    char **group_arg = new char*[2];
+    group_arg[0] = group->names[rotation_group];
+    group_arg[1] = (char *) "delete";
+    group->assign(2,group_arg);
+    delete [] group_arg;
+  }
+
   memory->destroy(local_gas_list);
   memory->destroy(atom_coord);
   memory->destroy(model_atom_buf);