diff --git a/src/first_steps/commandline_flags.md b/src/first_steps/commandline_flags.md
index 0678d21d..920a5fe9 100644
--- a/src/first_steps/commandline_flags.md
+++ b/src/first_steps/commandline_flags.md
@@ -82,7 +82,7 @@ Open a file in write mode and do not parse the headers (raw mode).
 $ r2 -nw file
 ```
 
-Quickly get into the r2 shell opening a 1KB malloc virtual file, handy for testing things. note that a single dash is an alias for malloc://1024
+Quickly get into the r2 shell opening a 512B malloc virtual file, handy for testing things. note that a single dash is an alias for malloc://512
 
 ```console
 $ r2 -