diff --git a/doc/src/fix_atom_swap.txt b/doc/src/fix_atom_swap.txt
index 22091eca00..cb6bc26aa1 100644
--- a/doc/src/fix_atom_swap.txt
+++ b/doc/src/fix_atom_swap.txt
@@ -141,11 +141,16 @@ specify if this should be done.
 
 This fix writes the state of the fix to "binary restart
 files"_restart.html.  This includes information about the random
-number generator seed, the next timestep for MC exchanges, etc.  See
+number generator seed, the next timestep for MC exchanges, the number
+of exchange attempts and successes etc.  See
 the "read_restart"_read_restart.html command for info on how to
 re-specify a fix in an input script that reads a restart file, so that
 the operation of the fix continues in an uninterrupted fashion.
 
+NOTE: For this to work correctly, the timestep must [not] be changed
+after reading the restart with "reset_timestep"_reset_timestep.html.
+The fix will try to detect it and stop with an error.
+
 None of the "fix_modify"_fix_modify.html options are relevant to this
 fix.
 
diff --git a/doc/src/fix_deposit.txt b/doc/src/fix_deposit.txt
index fd12d4bb45..9ab125a55f 100644
--- a/doc/src/fix_deposit.txt
+++ b/doc/src/fix_deposit.txt
@@ -261,6 +261,10 @@ next timestep for deposition, etc.  See the
 a fix in an input script that reads a restart file, so that the
 operation of the fix continues in an uninterrupted fashion.
 
+NOTE: For this to work correctly, the timestep must [not] be changed
+after reading the restart with "reset_timestep"_reset_timestep.html.
+The fix will try to detect it and stop with an error.
+
 None of the "fix_modify"_fix_modify.html options are relevant to this
 fix.  No global or per-atom quantities are stored by this fix for
 access by various "output commands"_Howto_output.html.  No parameter
diff --git a/doc/src/fix_gcmc.txt b/doc/src/fix_gcmc.txt
index 8a66a007a3..3c0f2c2f17 100644
--- a/doc/src/fix_gcmc.txt
+++ b/doc/src/fix_gcmc.txt
@@ -373,11 +373,16 @@ adds all inserted atoms of the specified type to the
 
 This fix writes the state of the fix to "binary restart
 files"_restart.html.  This includes information about the random
-number generator seed, the next timestep for MC exchanges, etc.  See
+number generator seed, the next timestep for MC exchanges,  the number
+of MC step attempts and successes etc.  See
 the "read_restart"_read_restart.html command for info on how to
 re-specify a fix in an input script that reads a restart file, so that
 the operation of the fix continues in an uninterrupted fashion.
 
+NOTE: For this to work correctly, the timestep must [not] be changed
+after reading the restart with "reset_timestep"_reset_timestep.html.
+The fix will try to detect it and stop with an error.
+
 None of the "fix_modify"_fix_modify.html options are relevant to this
 fix.