diff --git a/docs/Rssi.md b/docs/Rssi.md
index 4080d3fff..c081b06df 100644
--- a/docs/Rssi.md
+++ b/docs/Rssi.md
@@ -72,7 +72,7 @@ Then, calculate the offset and scale values using the following formula:
 
 ```
 rssi_offset = 1000-(rssi_nosig) / 10
-rssi_scale = 100 * 1000 * (rssi_fullsig - rssi_nosig)
+rssi_scale = 100 * 1000 / (rssi_fullsig - rssi_nosig)
 ```
 
 Examples are: