diff --git a/src/setup/cmd_line_args.h b/src/setup/cmd_line_args.h
index aa4fefd67fbffc000cbe48be45290b8f0d810c66..366fa3b02f9b0d09b6071e18cd8775a15d81bb43 100644
--- a/src/setup/cmd_line_args.h
+++ b/src/setup/cmd_line_args.h
@@ -3006,7 +3006,7 @@ struct cmd_line_arg_t
 {                                                                       \
     ARG_SECTION_BINARY,                                                 \
         "nova_timestep_accelerator_num",                                \
-        "The nova timestep is accelerated if the nova number exceeds nova_timestep_accelerator_num. If zero or negative, acceleration is off. See also nova_timestep_accelerator_index and nova_timestep_accelerator_max.\n", \
+        "The nova timestep is accelerated if the nova number exceeds nova_timestep_accelerator_num. If zero or negative, acceleration is off. See also nova_timestep_accelerator_index and nova_timestep_accelerator_max. Only used if individual_novae is on.\n", \
         ARG_FLOAT,                                                      \
         WTTS_USE_DEFAULT,                                               \
         &(stardata->preferences->nova_timestep_accelerator_num),        \
@@ -3016,7 +3016,7 @@ struct cmd_line_arg_t
 {                                                                       \
     ARG_SECTION_BINARY,                                                 \
         "nova_timestep_accelerator_index",                              \
-        "The index at which the nova timestep is accelerated. A larger value gives longer timesteps. See also nova_timestep_accelerator_num and nova_timestep_accelerator_max.\n", \
+        "The index at which the nova timestep is accelerated. A larger value gives longer timesteps. See also nova_timestep_accelerator_num and nova_timestep_accelerator_max. Only used if individual_novae is on.\n", \
         ARG_FLOAT,                                                      \
         WTTS_USE_DEFAULT,                                               \
         &(stardata->preferences->nova_timestep_accelerator_index),      \
@@ -3026,7 +3026,7 @@ struct cmd_line_arg_t
 {                                                                       \
     ARG_SECTION_BINARY,                                                 \
         "nova_timestep_accelerator_max",                                \
-        "The nova timestep is accelerated by a factor that is capped at nova_timestep_accelerator_max. This parameter is ignored if it is zero or negative. See also nova_timestep_accelerator_num and nova_timestep_accelerator_index.\n", \
+        "The nova timestep is accelerated by a factor that is capped at nova_timestep_accelerator_max. This parameter is ignored if it is zero or negative. See also nova_timestep_accelerator_num and nova_timestep_accelerator_index. Only used if individual_novae is on.\n", \
         ARG_FLOAT,                                                      \
         WTTS_USE_DEFAULT,                                               \
         &(stardata->preferences->nova_timestep_accelerator_max),        \
diff --git a/tbse b/tbse
index 351de6b6b48db9f10ce1e9c8ddd26d6803d1f7ef..63000af9f10f1c6fa9cf5b800a874eebe624f3fb 100755
--- a/tbse
+++ b/tbse
@@ -1182,7 +1182,8 @@ TIMESTEP_SOLVER_FACTOR=1.0
 TIMESTEP_MODULATOR=1.0
 
 ############################################################
-# Nova timestep acceleration.
+# Nova timestep acceleration, used when individual_novae
+# is True.
 #
 # The idea here 
 #