diff --git a/rslib/src/storage/sqlite.rs b/rslib/src/storage/sqlite.rs
index 7da32d897..525721814 100644
--- a/rslib/src/storage/sqlite.rs
+++ b/rslib/src/storage/sqlite.rs
@@ -235,7 +235,7 @@ fn add_extract_custom_data_function(db: &Connection) -> rusqlite::Result<()> {
     )
 }
 
-/// eg. extract_fsrs_variable(card.data, 's' | 'd') -> float | null
+/// eg. extract_fsrs_variable(card.data, 's' | 'd' | 'dr') -> float | null
 fn add_extract_fsrs_variable(db: &Connection) -> rusqlite::Result<()> {
     db.create_scalar_function(
         "extract_fsrs_variable",
@@ -257,6 +257,7 @@ fn add_extract_fsrs_variable(db: &Connection) -> rusqlite::Result<()> {
             Ok(match key {
                 "s" => card_data.fsrs_stability,
                 "d" => card_data.fsrs_difficulty,
+                "dr" => card_data.fsrs_desired_retention,
                 _ => panic!("invalid key: {key}"),
             })
         },