diff --git a/rslib/src/storage/sqlite.rs b/rslib/src/storage/sqlite.rs
index e7057946d..fb7066caf 100644
--- a/rslib/src/storage/sqlite.rs
+++ b/rslib/src/storage/sqlite.rs
@@ -384,10 +384,8 @@ fn add_extract_fsrs_relative_retrievability(db: &Connection) -> rusqlite::Result
                             .max(0.0001);
 
                         return Ok(Some(
-                            // power should be the reciprocal of the value of DECAY in FSRS-rs,
-                            // which is currently -0.5
-                            -(current_retrievability.powi(-2) - 1.)
-                                / (desired_retrievability.powi(-2) - 1.),
+                            -(current_retrievability.powf(-1.0 / decay) - 1.)
+                                / (desired_retrievability.powf(-1.0 / decay) - 1.),
                         ));
                     }
                 }