diff --git a/README.md b/README.md
index ab9715d4..6b41ca8e 100644
--- a/README.md
+++ b/README.md
@@ -1113,7 +1113,7 @@ Platforms: all
 
 
 #### onProgress
-Callback function that is called every progressUpdateInterval seconds with info about which position the media is currently playing.
+Callback function that is called every progressUpdateInterval milliseconds with info about which position the media is currently playing.
 
 Property | Type | Description
 --- | --- | ---