diff --git a/b2/_cli/argcompleters.py b/b2/_cli/argcompleters.py
index d3edfd658..dc070eebe 100644
--- a/b2/_cli/argcompleters.py
+++ b/b2/_cli/argcompleters.py
@@ -8,6 +8,10 @@
 #
 ######################################################################
 
+# We import all the necessary modules lazily in completers in order
+# to avoid upfront cost of the imports when argcompleter is used for
+# autocompletions.
+
 from itertools import islice
 
 
diff --git a/changelog.d/+improve_autocomplete_performance.fixed.md b/changelog.d/+improve_autocomplete_performance.fixed.md
new file mode 100644
index 000000000..e69de29bb