diff --git a/ftl/core/deck-config.ftl b/ftl/core/deck-config.ftl
index febb9065c..286e6bae8 100644
--- a/ftl/core/deck-config.ftl
+++ b/ftl/core/deck-config.ftl
@@ -396,6 +396,7 @@ deck-config-weights = FSRS parameters
 deck-config-compute-optimal-weights = Optimize FSRS parameters
 deck-config-compute-minimum-recommended-retention = Minimum recommended retention
 deck-config-optimize-button = Optimize Current Preset
+# Indicates that a given function or label, provided via the "text" variable, operates slowly.
 deck-config-slow-suffix = { $text } (slow)
 deck-config-compute-button = Compute
 deck-config-ignore-before = Ignore cards reviewed before