diff --git a/docs/Rssi.md b/docs/Rssi.md
index c081b06df3..47f1229072 100644
--- a/docs/Rssi.md
+++ b/docs/Rssi.md
@@ -71,7 +71,7 @@ To calculate the rssi offset and scale, check the rc value at full signal (`rssi
 Then, calculate the offset and scale values using the following formula:
 
 ```
-rssi_offset = 1000-(rssi_nosig) / 10
+rssi_offset = (1000-rssi_nosig) / 10
 rssi_scale = 100 * 1000 / (rssi_fullsig - rssi_nosig)
 ```