diff --git a/README.md b/README.md
index 725ac08..6b184e3 100644
--- a/README.md
+++ b/README.md
@@ -64,14 +64,14 @@ The maximum number of characters of the filename label displayed next to the pro
 $> BAR_FILENAME_LENGTH=7 ffmpeg-bar -i in.mp4 output.mp4
 ```
 
-##### `BAR_BEAM_RATIO `
+##### `BAR_SIZE_RATIO `
 
 The share of (available) horizontal display real estate the progress bar beam should occupy *(default: 0.75)*
 
 ###### Example
 
 ```bash
-$> BAR_BAR_SIZE_RATIO=0.5 ffmpeg-bar -i in.mp4 output.mp4
+$> BAR_SIZE_RATIO=0.5 ffmpeg-bar -i in.mp4 output.mp4
 ```
 
 ## <a name="requirements"/></a> Requirements