diff --git a/Understanding-Parameters.md b/Understanding-Parameters.md
index 2e234a3..91feec0 100644
--- a/Understanding-Parameters.md
+++ b/Understanding-Parameters.md
@@ -28,7 +28,7 @@ Reads annotations in the snirf file and throws away all data prior to *n* number
 
 **Parameters:**
 - TRIM (bool, default=True): True if trimming should occur, False if no trimming should occur.
-- SECONDS_TO_KEEP (int, default=5): Number of seconds before the first event occurs to keep to ensure the start of the file is not starting exactly at the first event.
+- SECONDS_TO_KEEP (float, default=5.0): Number of seconds before the first event occurs to keep to ensure the start of the file is not starting exactly at the first event.
 
 Note: If TRIM is set to False, SECONDS_TO_KEEP will be ignored.