diff --git a/src/QEQ/fix_qeq.cpp b/src/QEQ/fix_qeq.cpp
index c8112ca24d..394ce69d22 100644
--- a/src/QEQ/fix_qeq.cpp
+++ b/src/QEQ/fix_qeq.cpp
@@ -143,7 +143,8 @@ FixQEq::FixQEq(LAMMPS *lmp, int narg, char **arg) :
 FixQEq::~FixQEq()
 {
   // unregister callbacks to this fix from Atom class
-  atom->delete_callback(id,Atom::GROW);
+
+  if (modify->get_fix_by_id(id)) atom->delete_callback(id,Atom::GROW);
 
   memory->destroy(s_hist);
   memory->destroy(t_hist);
diff --git a/src/RIGID/fix_rigid_small.cpp b/src/RIGID/fix_rigid_small.cpp
index 089c644f1e..c579e362c7 100644
--- a/src/RIGID/fix_rigid_small.cpp
+++ b/src/RIGID/fix_rigid_small.cpp
@@ -481,7 +481,7 @@ FixRigidSmall::~FixRigidSmall()
 {
   // unregister callbacks to this fix from Atom class
 
-  atom->delete_callback(id,Atom::GROW);
+  if (modify->get_fix_by_id(id)) atom->delete_callback(id,Atom::GROW);
 
   // delete locally stored arrays
 
diff --git a/src/RIGID/fix_shake.cpp b/src/RIGID/fix_shake.cpp
index 6cd624c755..94c7668453 100644
--- a/src/RIGID/fix_shake.cpp
+++ b/src/RIGID/fix_shake.cpp
@@ -255,7 +255,7 @@ FixShake::~FixShake()
 
   // unregister callbacks to this fix from Atom class
 
-  atom->delete_callback(id,Atom::GROW);
+  if (modify->get_fix_by_id(id)) atom->delete_callback(id,Atom::GROW);
 
   // set bond_type and angle_type back to positive for SHAKE clusters
   // must set for all SHAKE bonds and angles stored by each atom