diff --git a/RASP_support/DrawCompFlow.py b/RASP_support/DrawCompFlow.py
index 0935380..af62732 100644
--- a/RASP_support/DrawCompFlow.py
+++ b/RASP_support/DrawCompFlow.py
@@ -464,11 +464,12 @@ def __init__(self, depth, d_heads, d_ffs, add_tokens_on_ff=False):
 			ff_parents += ff.get_nonminor_parent_sequences()
 		ff_parents = list(set(ff_parents))
 		ff_parents = [p for p in ff_parents if not guarded_contains(d_ffs, p)]
-		# in the trivial case (no parents and only one ff), the ff is marked as
-		# constant and should be labelled as 'X'
+		# in the trivial case (no parents and only one ff), the ff is
+		# temporarily marked as constant and should be labelled as 'X'
 		for x in [ff for ff in d_ffs if ff.is_constant()]:
 			d_ffs.remove(x)
 			ff_parents.append(x)
+			x._constant = False
 		rows_by_type = {RES: d_ffs, VVAR: ff_parents}
 		rowtype_order = [VVAR, RES]
 		if add_tokens_on_ff and not contains_tokens(ff_parents):
diff --git a/RASP_support/analyse.py b/RASP_support/analyse.py
index 42c93a9..f7183a9 100644
--- a/RASP_support/analyse.py
+++ b/RASP_support/analyse.py
@@ -186,7 +186,7 @@ def __init__(self, select, sequences, comp_depth):
 		# filter out non-ffs in the non-trivial case
 		all_ffs = [m for m in all_ffs if m.from_zipmap]
 	else:
-		# mark the sequence as constant in the case of trivial indices or tokens
+		# temporarily mark the sequence as constant in the trivial case
 		for ff in all_ffs:
 			ff.mark_as_constant()
 	if remove_minors: