diff --git a/bash.md b/bash.md
index 73e0b1abf..9452dba9e 100644
--- a/bash.md
+++ b/bash.md
@@ -623,7 +623,7 @@ $((a + 200))      # Add 200 to $a
 ```
 
 ```bash
-$((RANDOM%=200))  # Random number 0..200
+$(($RANDOM%200))  # Random number 0..199
 ```
 
 ### Subshells